From patchwork Wed Feb 23 19:13:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 1596870 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=canonical.com header.i=@canonical.com header.a=rsa-sha256 header.s=20210705 header.b=IGwAC6nS; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by bilbo.ozlabs.org (Postfix) with ESMTP id 4K3m1B3k47z9sG1 for ; Thu, 24 Feb 2022 06:14:06 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244183AbiBWTOb (ORCPT ); Wed, 23 Feb 2022 14:14:31 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55820 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244180AbiBWTOa (ORCPT ); Wed, 23 Feb 2022 14:14:30 -0500 Received: from smtp-relay-internal-0.canonical.com (smtp-relay-internal-0.canonical.com [185.125.188.122]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 49CD03FBC4 for ; Wed, 23 Feb 2022 11:14:02 -0800 (PST) Received: from mail-wr1-f72.google.com (mail-wr1-f72.google.com [209.85.221.72]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-internal-0.canonical.com (Postfix) with ESMTPS id 1BCD540A7C for ; Wed, 23 Feb 2022 19:14:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1645643641; bh=jDkZtIbGu7Rx+CZZvT8FrNfVIDpOYhUi3Zl4KFBr3UY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=IGwAC6nS35dFH2T0uc6fUmdhEzcRmPkopG7k+2Q5Ty9jRVVdbpB36uTp57QMU2s1+ WWf02QpQ4WGxbmmt0oODPp0EzPvAszGFIonAkbJ/jVmbvL9y1uCGFwg57EAgNThfio 2woGD2PBmfRS9BzxY0jmac1jHqOYhasLPrE0stYxPSMGjJOMijrZS4ryugDM5rAi7v eecYf4A3hPaW0LE9ba8tWcLKeERNGtu6oeIbTGpm5rN0yOQ/vAo6hBmpldlPGUw1Hj 6OELyiOToML9uXMNIqmCgBZNPk6hZS2k8ISU/i5U6gekpYBwsJMEPIarBFuoHMj0M4 /e9izex49tzxg== Received: by mail-wr1-f72.google.com with SMTP id o9-20020adfca09000000b001ea79f7edf8so3408861wrh.16 for ; Wed, 23 Feb 2022 11:14:01 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=jDkZtIbGu7Rx+CZZvT8FrNfVIDpOYhUi3Zl4KFBr3UY=; b=8Drg85Df7Fj2wLJIqJ9l9yl12VB6JmJoGyvWq88mcnnfiZYfr64S3tmk5rR0GNRA28 FYhH4RxJymBjW9k7Bf9HC+rwo3Xzq82pjbaqRLeDrpjhslR4F+FL8V8MyJlnTtwgagqg fXmVjyQ/+BRhNU3rIJm3OQhVYuLqdnERx0jq1Xqx7oyxYnucZS/vyEoLBJWfKNThTMul 9mnhVbDSyhsFQNLnVdsDGjVmqGz4Xj6YcHQFXY/zMAuc9Evn7P+qBVunCyk0Qy7XxQwe Dch7hjMjociP8u4TgTppXDi5LW2zq1wAfOiNQDe8/0W6hSWoEjlV7AdLRwJeSVugrk7U K2xw== X-Gm-Message-State: AOAM531deLkNNqaVjtG2JPFnyMFaVi8wOzinC7rcSLQnvS5K3Pklm5So depcgVnMNE727Sd8GDQo6wTlb5Cc/x3+dlc/ogp/c56fr5D7gsSXpM4HWKL3jgkRmJUL/s1CmvJ /j5JLILfGdMF0at3APbgAFVc4hs8oIVCFCA6fJg== X-Received: by 2002:a17:906:16cc:b0:6ce:e607:ff02 with SMTP id t12-20020a17090616cc00b006cee607ff02mr872192ejd.418.1645643630078; Wed, 23 Feb 2022 11:13:50 -0800 (PST) X-Google-Smtp-Source: ABdhPJwxRdig8NaceeNOO2F1vxV5JTwYIw54VeRpY5+G4e03MaYaAg/BDtvoqP0gdGTwXBo6IyszVA== X-Received: by 2002:a17:906:16cc:b0:6ce:e607:ff02 with SMTP id t12-20020a17090616cc00b006cee607ff02mr872176ejd.418.1645643629849; Wed, 23 Feb 2022 11:13:49 -0800 (PST) Received: from localhost.localdomain (xdsl-188-155-181-108.adslplus.ch. [188.155.181.108]) by smtp.gmail.com with ESMTPSA id q5sm212611ejc.115.2022.02.23.11.13.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Feb 2022 11:13:48 -0800 (PST) From: Krzysztof Kozlowski To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Stuart Yoder , Laurentiu Tudor , Abel Vesa , Shawn Guo , Sascha Hauer , Fabio Estevam , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , Bjorn Helgaas , Bjorn Andersson , Mathieu Poirier , Vineeth Vijayan , Peter Oberparleiter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Andy Gross , Srinivas Kandagatla , Mark Brown , "Michael S. Tsirkin" , Jason Wang , linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, NXP Linux Team , linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, linux-spi@vger.kernel.org, virtualization@lists.linux-foundation.org, Linus Torvalds Cc: Rasmus Villemoes , Krzysztof Kozlowski Subject: [PATCH v2 01/11] driver: platform: add and use helper for safer setting of driver_override Date: Wed, 23 Feb 2022 20:13:00 +0100 Message-Id: <20220223191310.347669-2-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> References: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Several core drivers and buses expect that driver_override is a dynamically allocated memory thus later they can kfree() it. However such assumption is not documented, there were in the past and there are already users setting it to a string literal. This leads to kfree() of static memory during device release (e.g. in error paths or during unbind): kernel BUG at ../mm/slub.c:3960! Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM ... (kfree) from [] (platform_device_release+0x88/0xb4) (platform_device_release) from [] (device_release+0x2c/0x90) (device_release) from [] (kobject_put+0xec/0x20c) (kobject_put) from [] (exynos5_clk_probe+0x154/0x18c) (exynos5_clk_probe) from [] (platform_drv_probe+0x6c/0xa4) (platform_drv_probe) from [] (really_probe+0x280/0x414) (really_probe) from [] (driver_probe_device+0x78/0x1c4) (driver_probe_device) from [] (bus_for_each_drv+0x74/0xb8) (bus_for_each_drv) from [] (__device_attach+0xd4/0x16c) (__device_attach) from [] (bus_probe_device+0x88/0x90) (bus_probe_device) from [] (device_add+0x3dc/0x62c) (device_add) from [] (of_platform_device_create_pdata+0x94/0xbc) (of_platform_device_create_pdata) from [] (of_platform_bus_create+0x1a8/0x4fc) (of_platform_bus_create) from [] (of_platform_bus_create+0x20c/0x4fc) (of_platform_bus_create) from [] (of_platform_populate+0x84/0x118) (of_platform_populate) from [] (of_platform_default_populate_init+0xa0/0xb8) (of_platform_default_populate_init) from [] (do_one_initcall+0x8c/0x404) (do_one_initcall) from [] (kernel_init_freeable+0x3d0/0x4d8) (kernel_init_freeable) from [] (kernel_init+0x8/0x114) (kernel_init) from [] (ret_from_fork+0x14/0x20) Provide a helper which clearly documents the usage of driver_override. This will allow later to reuse the helper and reduce amount of duplicated code. Signed-off-by: Krzysztof Kozlowski --- drivers/base/driver.c | 44 +++++++++++++++++++++++++++++++++ drivers/base/platform.c | 24 +++--------------- include/linux/device/driver.h | 1 + include/linux/platform_device.h | 6 ++++- 4 files changed, 54 insertions(+), 21 deletions(-) diff --git a/drivers/base/driver.c b/drivers/base/driver.c index 8c0d33e182fd..79efe51bb4c0 100644 --- a/drivers/base/driver.c +++ b/drivers/base/driver.c @@ -30,6 +30,50 @@ static struct device *next_device(struct klist_iter *i) return dev; } +/* + * set_driver_override() - Helper to set or clear driver override. + * @dev: Device to change + * @override: Address of string to change (e.g. &device->driver_override); + * The contents will be freed and hold newly allocated override. + * @s: NULL terminated string, new driver name to force a match, pass empty + * string to clear it + * + * Helper to setr or clear driver override in a device, intended for the cases + * when the driver_override field is allocated by driver/bus code. + * + * Returns: 0 on success or a negative error code on failure. + */ +int driver_set_override(struct device *dev, char **override, const char *s) +{ + char *new, *old, *cp; + + if (!dev || !override || !s) + return -EINVAL; + + new = kstrndup(s, strlen(s), GFP_KERNEL); + if (!new) + return -ENOMEM; + + cp = strchr(new, '\n'); + if (cp) + *cp = '\0'; + + device_lock(dev); + old = *override; + if (strlen(new)) { + *override = new; + } else { + kfree(new); + *override = NULL; + } + device_unlock(dev); + + kfree(old); + + return 0; +} +EXPORT_SYMBOL_GPL(driver_set_override); + /** * driver_for_each_device - Iterator for devices bound to a driver. * @drv: Driver we're iterating. diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 6cb04ac48bf0..d8853b32ea10 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -1275,31 +1275,15 @@ static ssize_t driver_override_store(struct device *dev, const char *buf, size_t count) { struct platform_device *pdev = to_platform_device(dev); - char *driver_override, *old, *cp; + int ret; /* We need to keep extra room for a newline */ if (count >= (PAGE_SIZE - 1)) return -EINVAL; - driver_override = kstrndup(buf, count, GFP_KERNEL); - if (!driver_override) - return -ENOMEM; - - cp = strchr(driver_override, '\n'); - if (cp) - *cp = '\0'; - - device_lock(dev); - old = pdev->driver_override; - if (strlen(driver_override)) { - pdev->driver_override = driver_override; - } else { - kfree(driver_override); - pdev->driver_override = NULL; - } - device_unlock(dev); - - kfree(old); + ret = driver_set_override(dev, &pdev->driver_override, buf); + if (ret) + return ret; return count; } diff --git a/include/linux/device/driver.h b/include/linux/device/driver.h index 15e7c5e15d62..81c0d9f65a40 100644 --- a/include/linux/device/driver.h +++ b/include/linux/device/driver.h @@ -151,6 +151,7 @@ extern int __must_check driver_create_file(struct device_driver *driver, extern void driver_remove_file(struct device_driver *driver, const struct driver_attribute *attr); +int driver_set_override(struct device *dev, char **override, const char *s); extern int __must_check driver_for_each_device(struct device_driver *drv, struct device *start, void *data, diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h index 7c96f169d274..37ac14459499 100644 --- a/include/linux/platform_device.h +++ b/include/linux/platform_device.h @@ -31,7 +31,11 @@ struct platform_device { struct resource *resource; const struct platform_device_id *id_entry; - char *driver_override; /* Driver name to force a match */ + /* + * Driver name to force a match, use + * driver_set_override() to set or clear it. + */ + char *driver_override; /* MFD cell pointer */ struct mfd_cell *mfd_cell; From patchwork Wed Feb 23 19:13:01 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 1596869 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=canonical.com header.i=@canonical.com header.a=rsa-sha256 header.s=20210705 header.b=lF+u9h7M; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by bilbo.ozlabs.org (Postfix) with ESMTP id 4K3m191cTPz9sG2 for ; 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[188.155.181.108]) by smtp.gmail.com with ESMTPSA id q5sm212611ejc.115.2022.02.23.11.13.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Feb 2022 11:13:51 -0800 (PST) From: Krzysztof Kozlowski To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Stuart Yoder , Laurentiu Tudor , Abel Vesa , Shawn Guo , Sascha Hauer , Fabio Estevam , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , Bjorn Helgaas , Bjorn Andersson , Mathieu Poirier , Vineeth Vijayan , Peter Oberparleiter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Andy Gross , Srinivas Kandagatla , Mark Brown , "Michael S. Tsirkin" , Jason Wang , linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, NXP Linux Team , linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, linux-spi@vger.kernel.org, virtualization@lists.linux-foundation.org, Linus Torvalds Cc: Rasmus Villemoes , Krzysztof Kozlowski Subject: [PATCH v2 02/11] amba: use helper for safer setting of driver_override Date: Wed, 23 Feb 2022 20:13:01 +0100 Message-Id: <20220223191310.347669-3-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> References: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Use a helper for seting driver_override to reduce amount of duplicated code. Signed-off-by: Krzysztof Kozlowski --- drivers/amba/bus.c | 24 ++++-------------------- 1 file changed, 4 insertions(+), 20 deletions(-) diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c index e1a5eca3ae3c..12410c05ec70 100644 --- a/drivers/amba/bus.c +++ b/drivers/amba/bus.c @@ -94,31 +94,15 @@ static ssize_t driver_override_store(struct device *_dev, const char *buf, size_t count) { struct amba_device *dev = to_amba_device(_dev); - char *driver_override, *old, *cp; + int ret; /* We need to keep extra room for a newline */ if (count >= (PAGE_SIZE - 1)) return -EINVAL; - driver_override = kstrndup(buf, count, GFP_KERNEL); - if (!driver_override) - return -ENOMEM; - - cp = strchr(driver_override, '\n'); - if (cp) - *cp = '\0'; - - device_lock(_dev); - old = dev->driver_override; - if (strlen(driver_override)) { - dev->driver_override = driver_override; - } else { - kfree(driver_override); - dev->driver_override = NULL; - } - device_unlock(_dev); - - kfree(old); + ret = driver_set_override(_dev, &dev->driver_override, buf); + if (ret) + return ret; return count; } From patchwork Wed Feb 23 19:13:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 1596871 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=canonical.com header.i=@canonical.com header.a=rsa-sha256 header.s=20210705 header.b=AVfo1n4g; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by bilbo.ozlabs.org (Postfix) with ESMTP id 4K3m1X3xvKz9sG1 for ; Thu, 24 Feb 2022 06:14:24 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244197AbiBWTOt (ORCPT ); Wed, 23 Feb 2022 14:14:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56334 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244227AbiBWTOr (ORCPT ); Wed, 23 Feb 2022 14:14:47 -0500 Received: from smtp-relay-internal-0.canonical.com (smtp-relay-internal-0.canonical.com [185.125.188.122]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E086D4131C for ; Wed, 23 Feb 2022 11:14:07 -0800 (PST) Received: from mail-lf1-f71.google.com (mail-lf1-f71.google.com [209.85.167.71]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-internal-0.canonical.com (Postfix) with ESMTPS id B87C3407CE for ; Wed, 23 Feb 2022 19:14:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1645643646; bh=fyZde4QL+5WSjtUcZmZyQ9LOCmYULjkOm0dq/nBIuzo=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=AVfo1n4gcz5sP9eSVoxh14pYI1VX2wWnk4L7C/U/uZ5DBrFbr93K51NjBc0D3dyLh K7U8lLhV2vcy7jOWYSJTLyvkgEgcSMfacnuZFh5ViY3YMjdiEQdThUb8KFy3WgyasZ UthdQVK140ASKfr/E+P60quTHgNwvQjYNMFAFcd/Gqro3A2wqWJz7zEoNCN62X1p8a x6tMgiqdYN36KnPALVnlk2scPEehEStq1mZ2yUy/toJxAmnZVSaIsjCEae07FYYFPp azQSClC3UWWPkg1EvGy+fz+srUcH+GAFwoEbTtp4RXZ3e73i3zpaaz0Gn2xbemmk0J fKu64BCA0M1fQ== Received: by mail-lf1-f71.google.com with SMTP id q25-20020a056512211900b004422b53ec42so329lfr.5 for ; Wed, 23 Feb 2022 11:14:06 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=fyZde4QL+5WSjtUcZmZyQ9LOCmYULjkOm0dq/nBIuzo=; b=N9V4tzPCfJlw24DaFPrX3ms+CUME1K+2JgIxkSBb+cuA4g37f/7Pz9DfOB8PIX3bkw V59JTntmCyjH/V93Veq/os6UgVVIVQD0ecjdtL8xBrS2qDDtOlSpInYfHx5SGoYAz7Rt 2lhrqsJE5FKIjUIVkOFtqn1sgFDyfgdpbx1mlpLQkw+scOCi1EZRhC30zjXWCG6dng17 hBFvtcqaeAoe05tC4Xzuuw4Vu53GUmXnq2P95Ocb6wSlH+bbTef0+3MYXjw5F421ipEo 95dCUHPKrdraMJ+MJK8Rss8K8vEBcARhTe6Ju7kvXGuPPXvCbTtO+mM9Y1t8YWJ7q8qz Ssqg== X-Gm-Message-State: AOAM5322mkQ0MYNy5/XZt8qrueGm4z7HKXiYYTUQdu3tNrSjKZO7dvDh 5boOLV/EFcl3kdWpSQipcJED2Du0tu2e74BMylnKkD78fzUNlYivyqUq0TR+JWe7/XclLcy0Km1 9SlKi2Q8GAJNYsGLPGLtFzmy4sQQwnHJAgX8cFw== X-Received: by 2002:a17:906:a384:b0:6ce:c3f4:c59a with SMTP id k4-20020a170906a38400b006cec3f4c59amr870070ejz.580.1645643635869; Wed, 23 Feb 2022 11:13:55 -0800 (PST) X-Google-Smtp-Source: ABdhPJwQC18HONgcYdOr4fLdW/4QMQU7ra3n8dm0IepMHQhTlzr1OkJDjXXGMuSAKvUFTDXd0c3row== X-Received: by 2002:a17:906:a384:b0:6ce:c3f4:c59a with SMTP id k4-20020a170906a38400b006cec3f4c59amr870048ejz.580.1645643635630; Wed, 23 Feb 2022 11:13:55 -0800 (PST) Received: from localhost.localdomain (xdsl-188-155-181-108.adslplus.ch. [188.155.181.108]) by smtp.gmail.com with ESMTPSA id q5sm212611ejc.115.2022.02.23.11.13.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Feb 2022 11:13:54 -0800 (PST) From: Krzysztof Kozlowski To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Stuart Yoder , Laurentiu Tudor , Abel Vesa , Shawn Guo , Sascha Hauer , Fabio Estevam , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , Bjorn Helgaas , Bjorn Andersson , Mathieu Poirier , Vineeth Vijayan , Peter Oberparleiter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Andy Gross , Srinivas Kandagatla , Mark Brown , "Michael S. Tsirkin" , Jason Wang , linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, NXP Linux Team , linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, linux-spi@vger.kernel.org, virtualization@lists.linux-foundation.org, Linus Torvalds Cc: Rasmus Villemoes , Krzysztof Kozlowski Subject: [PATCH v2 03/11] fsl-mc: use helper for safer setting of driver_override Date: Wed, 23 Feb 2022 20:13:02 +0100 Message-Id: <20220223191310.347669-4-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> References: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Use a helper for seting driver_override to reduce amount of duplicated code. Signed-off-by: Krzysztof Kozlowski --- drivers/bus/fsl-mc/fsl-mc-bus.c | 22 ++++------------------ 1 file changed, 4 insertions(+), 18 deletions(-) diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c b/drivers/bus/fsl-mc/fsl-mc-bus.c index 8fd4a356a86e..d93f4f680f82 100644 --- a/drivers/bus/fsl-mc/fsl-mc-bus.c +++ b/drivers/bus/fsl-mc/fsl-mc-bus.c @@ -166,8 +166,7 @@ static ssize_t driver_override_store(struct device *dev, const char *buf, size_t count) { struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); - char *driver_override, *old = mc_dev->driver_override; - char *cp; + int ret; if (WARN_ON(dev->bus != &fsl_mc_bus_type)) return -EINVAL; @@ -175,22 +174,9 @@ static ssize_t driver_override_store(struct device *dev, if (count >= (PAGE_SIZE - 1)) return -EINVAL; - driver_override = kstrndup(buf, count, GFP_KERNEL); - if (!driver_override) - return -ENOMEM; - - cp = strchr(driver_override, '\n'); - if (cp) - *cp = '\0'; - - if (strlen(driver_override)) { - mc_dev->driver_override = driver_override; - } else { - kfree(driver_override); - mc_dev->driver_override = NULL; - } - - kfree(old); + ret = driver_set_override(dev, &mc_dev->driver_override, buf); + if (ret) + return ret; return count; } From patchwork Wed Feb 23 19:13:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 1596872 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=canonical.com header.i=@canonical.com header.a=rsa-sha256 header.s=20210705 header.b=qFsGfArd; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by bilbo.ozlabs.org (Postfix) with ESMTP id 4K3m1X7220z9sG2 for ; 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[188.155.181.108]) by smtp.gmail.com with ESMTPSA id q5sm212611ejc.115.2022.02.23.11.13.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Feb 2022 11:13:56 -0800 (PST) From: Krzysztof Kozlowski To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Stuart Yoder , Laurentiu Tudor , Abel Vesa , Shawn Guo , Sascha Hauer , Fabio Estevam , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , Bjorn Helgaas , Bjorn Andersson , Mathieu Poirier , Vineeth Vijayan , Peter Oberparleiter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Andy Gross , Srinivas Kandagatla , Mark Brown , "Michael S. Tsirkin" , Jason Wang , linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, NXP Linux Team , linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, linux-spi@vger.kernel.org, virtualization@lists.linux-foundation.org, Linus Torvalds Cc: Rasmus Villemoes , Krzysztof Kozlowski Subject: [PATCH v2 04/11] hv: vmbus: use helper for safer setting of driver_override Date: Wed, 23 Feb 2022 20:13:03 +0100 Message-Id: <20220223191310.347669-5-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> References: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Use a helper for seting driver_override to reduce amount of duplicated code. Signed-off-by: Krzysztof Kozlowski --- drivers/hv/vmbus_drv.c | 24 ++++-------------------- 1 file changed, 4 insertions(+), 20 deletions(-) diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 12a2b37e87f3..f2435cc8b680 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -575,31 +575,15 @@ static ssize_t driver_override_store(struct device *dev, const char *buf, size_t count) { struct hv_device *hv_dev = device_to_hv_device(dev); - char *driver_override, *old, *cp; + int ret; /* We need to keep extra room for a newline */ if (count >= (PAGE_SIZE - 1)) return -EINVAL; - driver_override = kstrndup(buf, count, GFP_KERNEL); - if (!driver_override) - return -ENOMEM; - - cp = strchr(driver_override, '\n'); - if (cp) - *cp = '\0'; - - device_lock(dev); - old = hv_dev->driver_override; - if (strlen(driver_override)) { - hv_dev->driver_override = driver_override; - } else { - kfree(driver_override); - hv_dev->driver_override = NULL; - } - device_unlock(dev); - - kfree(old); + ret = driver_set_override(dev, &hv_dev->driver_override, buf); + if (ret) + return ret; return count; } From patchwork Wed Feb 23 19:13:04 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 1596873 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=canonical.com header.i=@canonical.com header.a=rsa-sha256 header.s=20210705 header.b=jVJ93pkv; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by bilbo.ozlabs.org (Postfix) with ESMTP id 4K3m1c3g04z9sG1 for ; Thu, 24 Feb 2022 06:14:28 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244185AbiBWTOy (ORCPT ); Wed, 23 Feb 2022 14:14:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56328 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244213AbiBWTOt (ORCPT ); Wed, 23 Feb 2022 14:14:49 -0500 Received: from smtp-relay-internal-1.canonical.com (smtp-relay-internal-1.canonical.com [185.125.188.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A742E42A3D for ; Wed, 23 Feb 2022 11:14:18 -0800 (PST) Received: from mail-ej1-f71.google.com (mail-ej1-f71.google.com [209.85.218.71]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-internal-1.canonical.com (Postfix) with ESMTPS id 71F313FCA5 for ; Wed, 23 Feb 2022 19:14:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1645643646; bh=rf7a9EFQwPOyocENu81tYUT+5dnJvDmCZPPvLR/17AA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=jVJ93pkvhmrjx3ghrIji0yC3tMB//MN8n1BjQfo+/XK3qJ8OCsR3lpGoq05z83vzh mbHrmdYN/FE3K+gHhy9xnOsLUQCDno2Y4MA+PRHxyaSzNrJEwFm+2AByGV0rKRIJCb bQtwx9pQK85nMkUaBe5MRFYJ3unmti6uxkDHnDSUgEBNGSqydXukJpwbudShh3CFWf xEvT3aaeN1aaCSsZD4aNRaZTJpuFl4Ro18HdG8NWBh87vsZv7ZG8lHH199BLSL2HKB 4LwSbheNhEGs53YyvWfLPMuNm7OLH9VxhP1Xd7LBtXQIhpiOV6ZGZIbxd5sRmNjC5w PajNyfGtBL5OQ== Received: by mail-ej1-f71.google.com with SMTP id d19-20020a1709067a1300b006d5c8bdadd9so652346ejo.15 for ; Wed, 23 Feb 2022 11:14:06 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=rf7a9EFQwPOyocENu81tYUT+5dnJvDmCZPPvLR/17AA=; b=E2HNvI1lVAjZ4SNQYKMUbgA8iUoQ2NtxMuNnzwb7MloSqNzFqLl+ga/lZUSIrgyJjV 22JcoWt3tMZ1u7VFwr8MoR2/fd2xynlARoi7MZkbyTu11FGhrp+i/6UnSSy70/jiZfKE 4/I9K9NH8seorAjQTrcWX6J0ZSYfZlma1NXh3LAplPH0KxqObT6rgLgNudj6kosrDuR/ Yjcn4ku+nS/XI+r32R4QSSIohzNueSxmwkVjx/ozaOnnTYSWBdBsn2BRGo7zyUB+626V PjNaV0ZwbxGZPqYzL+mAXa6BkrDXUBEXp1iAJ/HjO6BOUATkllEcPqs23MUmWzecB1tG efeQ== X-Gm-Message-State: AOAM5321USW4jS3vplPBq/7pBNsRqc/3KmVPQLBZbovavtba2n05+UPx 14Bvlmq14CkdN2wqEpn179RWOE379nkOY3zHKH7TAbPaW2zCBp4ysgM8VCMpYMVEjgDjOoJuR3V wCVtBqhrr8rhPJeSiKP5Wf3RGzLWq85XtRKJFow== X-Received: by 2002:a17:906:e244:b0:6cd:24e3:ab8b with SMTP id gq4-20020a170906e24400b006cd24e3ab8bmr856464ejb.633.1645643640111; Wed, 23 Feb 2022 11:14:00 -0800 (PST) X-Google-Smtp-Source: ABdhPJyXgfLS9GHyX1kCvT/o1Mu24QLFIsYnwLPgsBOYcxKH/GiFu7jQtQB6sjAsK4TU39w3xnST4g== X-Received: by 2002:a17:906:e244:b0:6cd:24e3:ab8b with SMTP id gq4-20020a170906e24400b006cd24e3ab8bmr856416ejb.633.1645643639914; Wed, 23 Feb 2022 11:13:59 -0800 (PST) Received: from localhost.localdomain (xdsl-188-155-181-108.adslplus.ch. [188.155.181.108]) by smtp.gmail.com with ESMTPSA id q5sm212611ejc.115.2022.02.23.11.13.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Feb 2022 11:13:58 -0800 (PST) From: Krzysztof Kozlowski To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Stuart Yoder , Laurentiu Tudor , Abel Vesa , Shawn Guo , Sascha Hauer , Fabio Estevam , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , Bjorn Helgaas , Bjorn Andersson , Mathieu Poirier , Vineeth Vijayan , Peter Oberparleiter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Andy Gross , Srinivas Kandagatla , Mark Brown , "Michael S. Tsirkin" , Jason Wang , linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, NXP Linux Team , linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, linux-spi@vger.kernel.org, virtualization@lists.linux-foundation.org, Linus Torvalds Cc: Rasmus Villemoes , Krzysztof Kozlowski Subject: [PATCH v2 05/11] pci: use helper for safer setting of driver_override Date: Wed, 23 Feb 2022 20:13:04 +0100 Message-Id: <20220223191310.347669-6-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> References: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Use a helper for seting driver_override to reduce amount of duplicated code. Signed-off-by: Krzysztof Kozlowski --- drivers/pci/pci-sysfs.c | 24 ++++-------------------- 1 file changed, 4 insertions(+), 20 deletions(-) diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 602f0fb0b007..16a163d4623e 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -567,31 +567,15 @@ static ssize_t driver_override_store(struct device *dev, const char *buf, size_t count) { struct pci_dev *pdev = to_pci_dev(dev); - char *driver_override, *old, *cp; + int ret; /* We need to keep extra room for a newline */ if (count >= (PAGE_SIZE - 1)) return -EINVAL; - driver_override = kstrndup(buf, count, GFP_KERNEL); - if (!driver_override) - return -ENOMEM; - - cp = strchr(driver_override, '\n'); - if (cp) - *cp = '\0'; - - device_lock(dev); - old = pdev->driver_override; - if (strlen(driver_override)) { - pdev->driver_override = driver_override; - } else { - kfree(driver_override); - pdev->driver_override = NULL; - } - device_unlock(dev); - - kfree(old); + ret = driver_set_override(dev, &pdev->driver_override, buf); + if (ret) + return ret; return count; } From patchwork Wed Feb 23 19:13:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 1596875 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=canonical.com header.i=@canonical.com header.a=rsa-sha256 header.s=20210705 header.b=NML9qxCp; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by bilbo.ozlabs.org (Postfix) with ESMTP id 4K3m261MmLz9sG1 for ; Thu, 24 Feb 2022 06:14:54 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239142AbiBWTPS (ORCPT ); Wed, 23 Feb 2022 14:15:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56954 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244226AbiBWTPJ (ORCPT ); Wed, 23 Feb 2022 14:15:09 -0500 Received: from smtp-relay-internal-1.canonical.com (smtp-relay-internal-1.canonical.com [185.125.188.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 19446424B1 for ; Wed, 23 Feb 2022 11:14:40 -0800 (PST) Received: from mail-ej1-f71.google.com (mail-ej1-f71.google.com [209.85.218.71]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-internal-1.canonical.com (Postfix) with ESMTPS id B50EE3FCAA for ; Wed, 23 Feb 2022 19:14:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1645643673; bh=BfVj2+YbqU03eg9FI58FYBrziSuvlZ92uC4zdqn5CTE=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=NML9qxCpT89MY5V8iC0uoqP/RI+01HGVCuSHW6bOQeQdYzINTbJXed1khEHDSgOb8 LcbuWiCCp09yiuCOhqI/IslQMf80C3wT26DWF8YdZvthcgmKglR6QsVzKccwFsjKja w879Z3zI98ALCUpVTMnVIo9PPkds0cDL+5S/9/UM7+TbcShhduwm17PvJZgjd3Gd+q Y5vvroqcfDxlIHyQ+FRI4YlnRlNY4WznmiG4krsa+2RLFoKL5k14TaWGTmKn/NAv78 bLI5rCysfWGtkF4iNQQbsVbj0vc8vRJce9ERR3bh7wL6DX7ieQQ+tWDpuuLKyAJMtY UZZyuGc09w7Eg== Received: by mail-ej1-f71.google.com with SMTP id qa30-20020a170907869e00b006cee5e080easo7439539ejc.3 for ; Wed, 23 Feb 2022 11:14:33 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=BfVj2+YbqU03eg9FI58FYBrziSuvlZ92uC4zdqn5CTE=; b=jk84DoHCo5gf14Z4XbMUmg6MdBdwn69TMOjU6lsoDt6T0iQ3RO5KicFsRpp1l+ZhYp qJW46/N4sPi1XIY15AFADd3T8Ir/2WsJ4MpseqEvKHFIKz2L/naRq3CbKAEJGY1vkGo8 FMALKwWU6aFVFd6yOFcvaLz0dhBWqu5sD/Q3Prd2rtZXppn04QiyvNiZ/h8rEeTqR/Lz SprN8199Wr7bQkAh2f/V7PadWUceM/gP3gZZ9H6ay6aXupt8VvIvphB84BmLYr6o9eAo WbAIzXRwEyu5R2MLsT+stjvHzzOJU+4h3GF0Dv2gSjvET82EpIu1sXWMXKhetxx7Cbhn dMiA== X-Gm-Message-State: AOAM5324KhQMTeLTCD7t/o5DUs5d7+vFVddkID4Cc6qO7WvwNWRZH7PJ Sjvqxdfu/05QMDFaz77qy0h6Ni+YhoSq8GJQTOyr5B3IeZgTjuYWoKaJkNGPFr1Oq/9r06c4mJy 8c9IP5u9CXH+iLM6Ah3Aeqw2yZW+0rB+/w7o9Ag== X-Received: by 2002:a17:907:271b:b0:6b8:7863:bf3e with SMTP id w27-20020a170907271b00b006b87863bf3emr962566ejk.188.1645643642498; Wed, 23 Feb 2022 11:14:02 -0800 (PST) X-Google-Smtp-Source: ABdhPJxXMYb4BEMYhrxOu6QSGckuJedkkcxoYAbkZ+2GxGDgO4kr7mPrVFflFNpyN2dv7nSCwE216w== X-Received: by 2002:a17:907:271b:b0:6b8:7863:bf3e with SMTP id w27-20020a170907271b00b006b87863bf3emr962519ejk.188.1645643642300; Wed, 23 Feb 2022 11:14:02 -0800 (PST) Received: from localhost.localdomain (xdsl-188-155-181-108.adslplus.ch. [188.155.181.108]) by smtp.gmail.com with ESMTPSA id q5sm212611ejc.115.2022.02.23.11.14.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Feb 2022 11:14:01 -0800 (PST) From: Krzysztof Kozlowski To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Stuart Yoder , Laurentiu Tudor , Abel Vesa , Shawn Guo , Sascha Hauer , Fabio Estevam , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , Bjorn Helgaas , Bjorn Andersson , Mathieu Poirier , Vineeth Vijayan , Peter Oberparleiter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Andy Gross , Srinivas Kandagatla , Mark Brown , "Michael S. Tsirkin" , Jason Wang , linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, NXP Linux Team , linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, linux-spi@vger.kernel.org, virtualization@lists.linux-foundation.org, Linus Torvalds Cc: Rasmus Villemoes , Krzysztof Kozlowski Subject: [PATCH v2 06/11] s390: cio: use helper for safer setting of driver_override Date: Wed, 23 Feb 2022 20:13:05 +0100 Message-Id: <20220223191310.347669-7-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> References: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Use a helper for seting driver_override to reduce amount of duplicated code. Signed-off-by: Krzysztof Kozlowski --- drivers/s390/cio/css.c | 24 ++++-------------------- 1 file changed, 4 insertions(+), 20 deletions(-) diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c index fa8293335077..2ced49be1912 100644 --- a/drivers/s390/cio/css.c +++ b/drivers/s390/cio/css.c @@ -338,31 +338,15 @@ static ssize_t driver_override_store(struct device *dev, const char *buf, size_t count) { struct subchannel *sch = to_subchannel(dev); - char *driver_override, *old, *cp; + int ret; /* We need to keep extra room for a newline */ if (count >= (PAGE_SIZE - 1)) return -EINVAL; - driver_override = kstrndup(buf, count, GFP_KERNEL); - if (!driver_override) - return -ENOMEM; - - cp = strchr(driver_override, '\n'); - if (cp) - *cp = '\0'; - - device_lock(dev); - old = sch->driver_override; - if (strlen(driver_override)) { - sch->driver_override = driver_override; - } else { - kfree(driver_override); - sch->driver_override = NULL; - } - device_unlock(dev); - - kfree(old); + ret = driver_set_override(dev, &dev->driver_override, buf); + if (ret) + return ret; return count; } From patchwork Wed Feb 23 19:14:37 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 1596879 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=canonical.com header.i=@canonical.com header.a=rsa-sha256 header.s=20210705 header.b=Hm3rWFyP; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by bilbo.ozlabs.org (Postfix) with ESMTP id 4K3m2s3dMpz9sG2 for ; Thu, 24 Feb 2022 06:15:33 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234338AbiBWTP6 (ORCPT ); Wed, 23 Feb 2022 14:15:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58158 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235447AbiBWTP5 (ORCPT ); Wed, 23 Feb 2022 14:15:57 -0500 Received: from smtp-relay-internal-0.canonical.com (smtp-relay-internal-0.canonical.com [185.125.188.122]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 265B23FBCD for ; Wed, 23 Feb 2022 11:15:30 -0800 (PST) Received: from mail-ed1-f70.google.com (mail-ed1-f70.google.com [209.85.208.70]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-internal-0.canonical.com (Postfix) with ESMTPS id 750FC407CD for ; Wed, 23 Feb 2022 19:15:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1645643727; bh=7IYTHmQXzsIW766tCpVJPfNTfO+AmvxjDRcTslL8YGA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Hm3rWFyPS8I7bCm4OhD4ZS8CL7TXTXSK1burxnrcobeqxNiPwVtkheMeLmsdHQCct euTaB3bTXKGRztI9P5DSZMAuy5QYQO0DkQRdo7sTx7iqSmwamcKE/qi+TLi3Esmb8H kfJ+dSrZzoXKVDaG9pXmCfQOlVRpc8wxLy9PhUfj4Jnyguz5AeQK6UTkaiJgk9Zkl0 lBVTTt15Y28Ou/FDqDGEsDhaCkjU3Gk+LWAgOmUwiCFX6HJSmJZBnMqe2T1Lw2nHMC 9/mQytmQ5mzTh+wZp5b+OQWfz6w52HXx9LaCVCLkvcgILuAoCudYCON1ax1GoVqZiC 9vEg7b9cwzLiA== Received: by mail-ed1-f70.google.com with SMTP id j10-20020a05640211ca00b004090fd8a936so14065005edw.23 for ; Wed, 23 Feb 2022 11:15:27 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=7IYTHmQXzsIW766tCpVJPfNTfO+AmvxjDRcTslL8YGA=; b=OGMGqoNKn4aAu+0IEmfJPo5Te8hEFt7eC2da5or1UTSvG0nPn+KAQsjAfm3oF/QWsb XeM3mtzva8GEl3APG6WC5WqbK1ANRzxw6LtUM3jgE23FR7yBWuSMqcasFEY9P1qQa8M1 fdrlUDUaSxUwGnGuH1w1vTZ0l5qosInvfpdRLKLaBXWNxNBa387HqYJhj0lyjwETLyqY zEJ6ZxVwPOCJVI5QL6t77lSwyEMrUZ+WxQ8Z8xT28smbt5fXFGkOg027zKM6fy4TqA7D pK3xsgsInvHdF2IS5UUcE8YDzJRmsRiOFkI8ZVxVxlUCqs9hqh3S42YAG45QvoDko6VT 0dlA== X-Gm-Message-State: AOAM530kye3PmHFJSt00b97fsfZMuP/u3rZLRlvuyAd68nhn9Vquqb8i 1gmTKb65nDcvm6P3rFFdV2ryNNagHygX6jxz/VlzNmLHg+wa7BcZn5X/SFtUt3PNpF9lfK5GZvi /b83Vqy/Zr08y3Lv3I70dTcutHSFWsXY/++5Gig== X-Received: by 2002:a17:906:b57:b0:6ce:e31a:524 with SMTP id v23-20020a1709060b5700b006cee31a0524mr898049ejg.290.1645643723445; Wed, 23 Feb 2022 11:15:23 -0800 (PST) X-Google-Smtp-Source: ABdhPJwXaymv6Y03sx5emAtiihVKDslUlZDj5+bUOqZTX2T0tvcmba61MgF/pNNazmHUobDDFmGa2g== X-Received: by 2002:a17:906:b57:b0:6ce:e31a:524 with SMTP id v23-20020a1709060b5700b006cee31a0524mr898038ejg.290.1645643723190; Wed, 23 Feb 2022 11:15:23 -0800 (PST) Received: from localhost.localdomain (xdsl-188-155-181-108.adslplus.ch. [188.155.181.108]) by smtp.gmail.com with ESMTPSA id b3sm208368ejl.67.2022.02.23.11.15.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Feb 2022 11:15:22 -0800 (PST) From: Krzysztof Kozlowski To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Stuart Yoder , Laurentiu Tudor , Abel Vesa , Shawn Guo , Sascha Hauer , Fabio Estevam , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , Bjorn Helgaas , Bjorn Andersson , Mathieu Poirier , Vineeth Vijayan , Peter Oberparleiter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Andy Gross , Srinivas Kandagatla , Mark Brown , "Michael S. Tsirkin" , Jason Wang , linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, NXP Linux Team , linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, linux-spi@vger.kernel.org, virtualization@lists.linux-foundation.org, Linus Torvalds Cc: Rasmus Villemoes , Krzysztof Kozlowski Subject: [PATCH v2 07/11] spi: use helper for safer setting of driver_override Date: Wed, 23 Feb 2022 20:14:37 +0100 Message-Id: <20220223191441.348109-1-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> References: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Use a helper for seting driver_override to reduce amount of duplicated code. Remove also "const" from the definition of spi_device.driver_override, because it is not correct. The SPI driver already treats it as dynamic, not const, memory. Signed-off-by: Krzysztof Kozlowski --- drivers/spi/spi.c | 20 ++++---------------- include/linux/spi/spi.h | 2 +- 2 files changed, 5 insertions(+), 17 deletions(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 4599b121d744..0c7e2c34f4a3 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -74,27 +74,15 @@ static ssize_t driver_override_store(struct device *dev, struct spi_device *spi = to_spi_device(dev); const char *end = memchr(buf, '\n', count); const size_t len = end ? end - buf : count; - const char *driver_override, *old; + int ret; /* We need to keep extra room for a newline when displaying value */ if (len >= (PAGE_SIZE - 1)) return -EINVAL; - driver_override = kstrndup(buf, len, GFP_KERNEL); - if (!driver_override) - return -ENOMEM; - - device_lock(dev); - old = spi->driver_override; - if (len) { - spi->driver_override = driver_override; - } else { - /* Empty string, disable driver override */ - spi->driver_override = NULL; - kfree(driver_override); - } - device_unlock(dev); - kfree(old); + ret = driver_set_override(dev, &spi->driver_override, buf); + if (ret) + return ret; return count; } diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 7ab3fed7b804..01224d07aaff 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -184,7 +184,7 @@ struct spi_device { void *controller_state; void *controller_data; char modalias[SPI_NAME_SIZE]; - const char *driver_override; + char *driver_override; int cs_gpio; /* LEGACY: chip select gpio */ struct gpio_desc *cs_gpiod; /* chip select gpio desc */ struct spi_delay word_delay; /* inter-word delay */ From patchwork Wed Feb 23 19:14:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 1596880 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=canonical.com header.i=@canonical.com header.a=rsa-sha256 header.s=20210705 header.b=AF9ts47n; 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[188.155.181.108]) by smtp.gmail.com with ESMTPSA id b3sm208368ejl.67.2022.02.23.11.15.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Feb 2022 11:15:24 -0800 (PST) From: Krzysztof Kozlowski To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Stuart Yoder , Laurentiu Tudor , Abel Vesa , Shawn Guo , Sascha Hauer , Fabio Estevam , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , Bjorn Helgaas , Bjorn Andersson , Mathieu Poirier , Vineeth Vijayan , Peter Oberparleiter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Andy Gross , Srinivas Kandagatla , Mark Brown , "Michael S. Tsirkin" , Jason Wang , linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, NXP Linux Team , linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, linux-spi@vger.kernel.org, virtualization@lists.linux-foundation.org, Linus Torvalds Cc: Rasmus Villemoes , Krzysztof Kozlowski Subject: [PATCH v2 08/11] vdpa: use helper for safer setting of driver_override Date: Wed, 23 Feb 2022 20:14:38 +0100 Message-Id: <20220223191441.348109-2-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> References: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Use a helper for seting driver_override to reduce amount of duplicated code. Signed-off-by: Krzysztof Kozlowski --- drivers/vdpa/vdpa.c | 25 ++++--------------------- 1 file changed, 4 insertions(+), 21 deletions(-) diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c index 9846c9de4bfa..76ce2dcae7cb 100644 --- a/drivers/vdpa/vdpa.c +++ b/drivers/vdpa/vdpa.c @@ -77,32 +77,15 @@ static ssize_t driver_override_store(struct device *dev, const char *buf, size_t count) { struct vdpa_device *vdev = dev_to_vdpa(dev); - const char *driver_override, *old; - char *cp; + int ret; /* We need to keep extra room for a newline */ if (count >= (PAGE_SIZE - 1)) return -EINVAL; - driver_override = kstrndup(buf, count, GFP_KERNEL); - if (!driver_override) - return -ENOMEM; - - cp = strchr(driver_override, '\n'); - if (cp) - *cp = '\0'; - - device_lock(dev); - old = vdev->driver_override; - if (strlen(driver_override)) { - vdev->driver_override = driver_override; - } else { - kfree(driver_override); - vdev->driver_override = NULL; - } - device_unlock(dev); - - kfree(old); + ret = driver_set_override(dev, &vdev->driver_override, buf); + if (ret) + return ret; return count; } From patchwork Wed Feb 23 19:14:39 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 1596884 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=canonical.com header.i=@canonical.com header.a=rsa-sha256 header.s=20210705 header.b=pVjMCgYz; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by bilbo.ozlabs.org (Postfix) with ESMTP id 4K3m3K0R1fz9sG1 for ; Thu, 24 Feb 2022 06:15:57 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244295AbiBWTQV (ORCPT ); Wed, 23 Feb 2022 14:16:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58520 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244283AbiBWTQN (ORCPT ); Wed, 23 Feb 2022 14:16:13 -0500 Received: from smtp-relay-internal-0.canonical.com (smtp-relay-internal-0.canonical.com [185.125.188.122]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DFF8C42491 for ; Wed, 23 Feb 2022 11:15:41 -0800 (PST) Received: from mail-lj1-f198.google.com (mail-lj1-f198.google.com [209.85.208.198]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-internal-0.canonical.com (Postfix) with ESMTPS id 6FF9A407C9 for ; Wed, 23 Feb 2022 19:15:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1645643740; bh=WWBR/3RyyId0ctzqGYcSjorUZAyYEVp2bjQXWveQ/28=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=pVjMCgYzqof1V+7Sr6zskvN4auZKMkmvxFetwxMlLgm43iRoOU0cHfKf/FjW2Izgm NwZmNVC3Fqp+/2iCyYLp4m49XZ5yiUT2zkX+d3dX0mszf+fB7uCNB53PfToZc9DtY5 Z0ZKXQB8d4E9d8q2zJpPJuaDvFkbZmTHooQfxSLKUf0+SCDWd/Ib5uIagnVezKm7u1 zY2EBhQbWkUJ/bM4XmXynvohpoowflKNaVIzYK9dHlIiIraOftWYxrEC5qC+L25yqF TZGWn0Ln1e8BFgnx8SWXmwlO4BnbHL2NgbjUCOlW9VQhZPSnySc2R4oKIB0P1Gq+hN u7x+5/9yZ38ww== Received: by mail-lj1-f198.google.com with SMTP id 20-20020a2e0914000000b0024635d136ddso5901366ljj.22 for ; Wed, 23 Feb 2022 11:15:40 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=WWBR/3RyyId0ctzqGYcSjorUZAyYEVp2bjQXWveQ/28=; b=oGfr0+hZ/C5akZaNMC+zViXii2l9ZOw1w0EaxibNeYJPh7bslunfu/jkBxO3Yyn4s/ fdahLkF8krwj9NbHiAy9hLWv4pWNpSf/8ijKvOwCvcGJWQTVoj7A9W1yBqcfAxPOu0nm WxpPMBc7WVkYonZCNJxOf+fHjMXfKZ/1L/AWsdlyPQCn5cqzQsR8KW57hHbKAC00QszZ dt+oyE6F0x7zkj9zEk+w2Pqmep1OEv4nzoY5FIHRLgGuiH+R1p/qhWwdmUmR/UVnsFFe lE+N+6krX6ecVA9kIy8TF5+lV3jLOLw2S/RY9DMVlYxxyYbuFNnSlPbxpyKXeHYbMWE3 uN/A== X-Gm-Message-State: AOAM531/5dxJ592iBtG7me+J6irnjZ3teToTxHxIKzm9PYJwIMwFPNqS YEEkhnf2JSP8GfsvLsb0WU1OdGTg99lsybl15JodqcOV/waXLkbjm6f89MaERSzciGGlYW096Lu Kw6N+emH91TI0EYV5fQRs7UFwn9JBrOAgZFDr3Q== X-Received: by 2002:a05:6402:70d:b0:410:ba4d:736f with SMTP id w13-20020a056402070d00b00410ba4d736fmr891849edx.0.1645643727232; Wed, 23 Feb 2022 11:15:27 -0800 (PST) X-Google-Smtp-Source: ABdhPJw8vcySNYfbv43Pk2WXynTAOxXboVgUUSRQKZSxFWxW+kHULs5hedJTU2eFScz4UFZao2eyYQ== X-Received: by 2002:a05:6402:70d:b0:410:ba4d:736f with SMTP id w13-20020a056402070d00b00410ba4d736fmr891811edx.0.1645643727044; Wed, 23 Feb 2022 11:15:27 -0800 (PST) Received: from localhost.localdomain (xdsl-188-155-181-108.adslplus.ch. [188.155.181.108]) by smtp.gmail.com with ESMTPSA id b3sm208368ejl.67.2022.02.23.11.15.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Feb 2022 11:15:26 -0800 (PST) From: Krzysztof Kozlowski To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Stuart Yoder , Laurentiu Tudor , Abel Vesa , Shawn Guo , Sascha Hauer , Fabio Estevam , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , Bjorn Helgaas , Bjorn Andersson , Mathieu Poirier , Vineeth Vijayan , Peter Oberparleiter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Andy Gross , Srinivas Kandagatla , Mark Brown , "Michael S. Tsirkin" , Jason Wang , linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, NXP Linux Team , linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, linux-spi@vger.kernel.org, virtualization@lists.linux-foundation.org, Linus Torvalds Cc: Rasmus Villemoes , Krzysztof Kozlowski , stable@vger.kernel.org Subject: [PATCH v2 09/11] clk: imx: scu: fix kfree() of static memory on setting driver_override Date: Wed, 23 Feb 2022 20:14:39 +0100 Message-Id: <20220223191441.348109-3-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> References: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The driver_override field from platform driver should not be initialized from static memory (string literal) because the core later kfree() it, for example when driver_override is set via sysfs. Use dedicated helper to set driver_override properly. Fixes: 77d8f3068c63 ("clk: imx: scu: add two cells binding support") Cc: Signed-off-by: Krzysztof Kozlowski --- drivers/clk/imx/clk-scu.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/clk/imx/clk-scu.c b/drivers/clk/imx/clk-scu.c index 083da31dc3ea..15e1d670e51f 100644 --- a/drivers/clk/imx/clk-scu.c +++ b/drivers/clk/imx/clk-scu.c @@ -683,7 +683,12 @@ struct clk_hw *imx_clk_scu_alloc_dev(const char *name, return ERR_PTR(ret); } - pdev->driver_override = "imx-scu-clk"; + ret = driver_set_override(&pdev->dev, &pdev->driver_override, + "imx-scu-clk"); + if (ret) { + platform_device_put(pdev); + return ret; + } ret = imx_clk_scu_attach_pd(&pdev->dev, rsrc_id); if (ret) From patchwork Wed Feb 23 19:14:40 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 1596885 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=canonical.com header.i=@canonical.com header.a=rsa-sha256 header.s=20210705 header.b=YMJOTpWL; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by bilbo.ozlabs.org (Postfix) with ESMTP id 4K3m3R5Sxxz9sG1 for ; Thu, 24 Feb 2022 06:16:03 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240305AbiBWTQ3 (ORCPT ); Wed, 23 Feb 2022 14:16:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59106 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244319AbiBWTQZ (ORCPT ); Wed, 23 Feb 2022 14:16:25 -0500 Received: from smtp-relay-internal-1.canonical.com (smtp-relay-internal-1.canonical.com [185.125.188.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2CAF04161F for ; Wed, 23 Feb 2022 11:15:55 -0800 (PST) Received: from mail-ej1-f70.google.com (mail-ej1-f70.google.com [209.85.218.70]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-internal-1.canonical.com (Postfix) with ESMTPS id 555234099C for ; Wed, 23 Feb 2022 19:15:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1645643749; bh=oRXS+YkCrSg6HXmKQBekF6bqmCpfytEa7gv0higjFpc=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=YMJOTpWLQottgvpeky2LUTcHMrKn/HEqsgcLPV/czmSsXghZT+62PVGYmFLpp1Aok eIyuVUF5bjtpbZljxtSFcUMLXkQSFQAxgE9RR9Dyo/VhvKMX6dPt108/n8cyFsBV09 3EPDRWtYwj9X9E9DvSVzxf9pbtMktAMyordpx4kdCh7hHomBaIrbPPI0lJrIdhWDyk pQ1o4NyMxDNgPpxW3TnQPu7HEX/qktINnbi7pTG5avk4zTS9zJQnSGbHnSfaMyW4sD As42QQeBDQCZfHrHSh1muACVuP0F+QBxPHGwRVyqNuVs7ydob7jd1gTxJm/Nu8ZUaF sLX2Rm49RkonQ== Received: by mail-ej1-f70.google.com with SMTP id qa30-20020a170907869e00b006cee5e080easo7441044ejc.3 for ; Wed, 23 Feb 2022 11:15:49 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=oRXS+YkCrSg6HXmKQBekF6bqmCpfytEa7gv0higjFpc=; b=feHuetI1T6mnwgz0iu9CU2gRC6wLvWXCqbdR7fbspes6PW/9GlNBC07+9+2ek7ozyI JoyGHqJf8HZR+IONDgI0D0u5W/PBm+Rl7yc1XbM9yl1eTVB5e/8bVTcfGVfedG+M6Jhd y9qaHb3rBR+hcmj8osQGDuIRDiLhR0a0VVon8C7iSfBU8kIVWp+KuUalZtzsQ1xQoHdJ nABI2h9B/WcIhKr+5+8RC0mP82So3C4dNqQfOPRJv9sTNgjWPlsopbeB8TpMW6IvS871 ICDfTcFXJlp7t268gIwrRQP+qHEHw/llHGeoG8XWiHK8bNbDEcR+VlfDd9yfwFG3769X rTXQ== X-Gm-Message-State: AOAM531RfS45UhVbPXcZ8dcqeyZm/+5RJoZeWVLbIxfT0yyXgdwj65kb hz39eRxHmbv+hPRM+CNJ2EayjHOSL1arX4HVBvNLfTqEJbzH2K07h+7kS/J1VZxZPH/C2HcqICL PgqdSzqtBlkwJAsS94ATjYxczeXHI0OLP3wBOGA== X-Received: by 2002:a05:6402:3487:b0:40f:fa53:956c with SMTP id v7-20020a056402348700b0040ffa53956cmr894429edc.22.1645643729012; Wed, 23 Feb 2022 11:15:29 -0800 (PST) X-Google-Smtp-Source: ABdhPJx5CjazTLBKPiBmuMFKmO+Lmp6CQ3NgkMty7AAh8YmijE7P+oo2dQqmhFhNHN6v7AVbA25vYw== X-Received: by 2002:a05:6402:3487:b0:40f:fa53:956c with SMTP id v7-20020a056402348700b0040ffa53956cmr894395edc.22.1645643728802; Wed, 23 Feb 2022 11:15:28 -0800 (PST) Received: from localhost.localdomain (xdsl-188-155-181-108.adslplus.ch. [188.155.181.108]) by smtp.gmail.com with ESMTPSA id b3sm208368ejl.67.2022.02.23.11.15.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Feb 2022 11:15:28 -0800 (PST) From: Krzysztof Kozlowski To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Stuart Yoder , Laurentiu Tudor , Abel Vesa , Shawn Guo , Sascha Hauer , Fabio Estevam , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , Bjorn Helgaas , Bjorn Andersson , Mathieu Poirier , Vineeth Vijayan , Peter Oberparleiter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Andy Gross , Srinivas Kandagatla , Mark Brown , "Michael S. Tsirkin" , Jason Wang , linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, NXP Linux Team , linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, linux-spi@vger.kernel.org, virtualization@lists.linux-foundation.org, Linus Torvalds Cc: Rasmus Villemoes , Krzysztof Kozlowski , stable@vger.kernel.org Subject: [PATCH v2 10/11] slimbus: qcom-ngd: fix kfree() of static memory on setting driver_override Date: Wed, 23 Feb 2022 20:14:40 +0100 Message-Id: <20220223191441.348109-4-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> References: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The driver_override field from platform driver should not be initialized from static memory (string literal) because the core later kfree() it, for example when driver_override is set via sysfs. Use dedicated helper to set driver_override properly. Fixes: 917809e2280b ("slimbus: ngd: Add qcom SLIMBus NGD driver") Cc: Signed-off-by: Krzysztof Kozlowski --- drivers/slimbus/qcom-ngd-ctrl.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/slimbus/qcom-ngd-ctrl.c b/drivers/slimbus/qcom-ngd-ctrl.c index 7040293c2ee8..e1a8de4d41fb 100644 --- a/drivers/slimbus/qcom-ngd-ctrl.c +++ b/drivers/slimbus/qcom-ngd-ctrl.c @@ -1434,6 +1434,7 @@ static int of_qcom_slim_ngd_register(struct device *parent, const struct of_device_id *match; struct device_node *node; u32 id; + int ret; match = of_match_node(qcom_slim_ngd_dt_match, parent->of_node); data = match->data; @@ -1455,7 +1456,16 @@ static int of_qcom_slim_ngd_register(struct device *parent, } ngd->id = id; ngd->pdev->dev.parent = parent; - ngd->pdev->driver_override = QCOM_SLIM_NGD_DRV_NAME; + + ret = driver_set_override(&ngd->pdev->dev, + &ngd->pdev->driver_override, + QCOM_SLIM_NGD_DRV_NAME); + if (ret) { + platform_device_put(ngd->pdev); + kfree(ngd); + of_node_put(node); + return ret; + } ngd->pdev->dev.of_node = node; ctrl->ngd = ngd; From patchwork Wed Feb 23 19:14:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 1596883 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=canonical.com header.i=@canonical.com header.a=rsa-sha256 header.s=20210705 header.b=v32YP2a/; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by bilbo.ozlabs.org (Postfix) with ESMTP id 4K3m3H6fKvz9sG1 for ; Thu, 24 Feb 2022 06:15:55 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244304AbiBWTQU (ORCPT ); Wed, 23 Feb 2022 14:16:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58750 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244310AbiBWTQO (ORCPT ); Wed, 23 Feb 2022 14:16:14 -0500 Received: from smtp-relay-internal-0.canonical.com (smtp-relay-internal-0.canonical.com [185.125.188.122]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A2A65427CF for ; Wed, 23 Feb 2022 11:15:43 -0800 (PST) Received: from mail-wr1-f71.google.com (mail-wr1-f71.google.com [209.85.221.71]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-internal-0.canonical.com (Postfix) with ESMTPS id 80CA94092D for ; Wed, 23 Feb 2022 19:15:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1645643742; bh=7X8ZF+SfQI2ha/R62opt5Mpi3EJQ2IXnqtdf8o/szaw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=v32YP2a/sT/GzRfmmvx1BuJtYM7EJWo31JUmsdlNu39fw7N0rlIb+QTtUMb4uwry3 DkSrYtQSEh04yMU2MSEY8y5HDd/jqe09HY3grFC6VzppcpChGz/jL5j9imgNnksbsY d7Kk6AA4zku//iteTYeK4o4gF3KrbWgCuMnC3RuSweTXdo82HTEgZAVsLDnYesGFaQ +TJ9346tSN/YVQjS/g87DSeAEXpEZvWn9Kt4hfElfz6I+S/ecs/Nt9/PlO32nEj90B UGjya4xoyCTKNXgV21X6RKqm/r/P3WAF2kiKle2NaLv916R6mABWplH2K/yfnc1d3k VKexoM89m1F1w== Received: by mail-wr1-f71.google.com with SMTP id t8-20020a5d49c8000000b001edbf44d09cso681468wrs.9 for ; Wed, 23 Feb 2022 11:15:42 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=7X8ZF+SfQI2ha/R62opt5Mpi3EJQ2IXnqtdf8o/szaw=; b=vXupvAoHQrfVdsAHBOd3As8hpEMz+xNguM2qSmYLID+Fo/vPSiFkhQ049z8SCLuOUu w72AwvsWF65XseP/m4jgfYIhZP7ilRtYixnysOSdoPH3clO3SzHnNWq1yZadlwkFxFEP X3Hg1PWk8B2/v2X5AHx6JgeVlfoqqiuSZC7jqfN9Kec7hRa+Om5I7y3YNM8cZK4c8vjD 2QqIDRYyK5OsOOVqCQak/w2f9oN7KzGYZMzO31IEJBqmwjr1eQDgQVS9VhdDqDQ2Rz/R 9DiH5O/FddeKJoAMye+e1ojPtSSJIj8KKrfyW5m2dT1JyafdV0UbMHWop51+Tt6d1nUl rzSw== X-Gm-Message-State: AOAM531TVS9QW1MhmPKO8ghMt1oVzAJ8FGxsOVJBoTJk0+naNFRSPXOZ sBgq+up2HhPinduQ9fi0eJ464cmypXsp8mKg9xBYD1iRjDAkgEaOS5djgmbBfVdwKCKoRCG+fyQ yRu8T446kKHUJBNl4n+6+x7gaoVaOaINcCwzmbA== X-Received: by 2002:a17:906:130a:b0:6b7:5e48:350a with SMTP id w10-20020a170906130a00b006b75e48350amr887375ejb.184.1645643731008; Wed, 23 Feb 2022 11:15:31 -0800 (PST) X-Google-Smtp-Source: ABdhPJwzAUHN+IckyCUDaf6b+egXxiKcwH4G6el1z4Ve3vQHF0MnEv7U39pYdE62mAB1vpTAj/GhtQ== X-Received: by 2002:a17:906:130a:b0:6b7:5e48:350a with SMTP id w10-20020a170906130a00b006b75e48350amr887325ejb.184.1645643730755; Wed, 23 Feb 2022 11:15:30 -0800 (PST) Received: from localhost.localdomain (xdsl-188-155-181-108.adslplus.ch. [188.155.181.108]) by smtp.gmail.com with ESMTPSA id b3sm208368ejl.67.2022.02.23.11.15.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Feb 2022 11:15:30 -0800 (PST) From: Krzysztof Kozlowski To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Stuart Yoder , Laurentiu Tudor , Abel Vesa , Shawn Guo , Sascha Hauer , Fabio Estevam , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , Bjorn Helgaas , Bjorn Andersson , Mathieu Poirier , Vineeth Vijayan , Peter Oberparleiter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Andy Gross , Srinivas Kandagatla , Mark Brown , "Michael S. Tsirkin" , Jason Wang , linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, NXP Linux Team , linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, linux-spi@vger.kernel.org, virtualization@lists.linux-foundation.org, Linus Torvalds Cc: Rasmus Villemoes , Krzysztof Kozlowski , stable@vger.kernel.org Subject: [PATCH v2 11/11] rpmsg: fix kfree() of static memory on setting driver_override Date: Wed, 23 Feb 2022 20:14:41 +0100 Message-Id: <20220223191441.348109-5-krzysztof.kozlowski@canonical.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> References: <20220223191310.347669-1-krzysztof.kozlowski@canonical.com> MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The driver_override field from platform driver should not be initialized from static memory (string literal) because the core later kfree() it, for example when driver_override is set via sysfs. Use dedicated helper to set driver_override properly. Fixes: 950a7388f02b ("rpmsg: Turn name service into a stand alone driver") Fixes: c0cdc19f84a4 ("rpmsg: Driver for user space endpoint interface") Cc: Signed-off-by: Krzysztof Kozlowski --- drivers/rpmsg/rpmsg_internal.h | 13 +++++++++++-- drivers/rpmsg/rpmsg_ns.c | 14 ++++++++++++-- 2 files changed, 23 insertions(+), 4 deletions(-) diff --git a/drivers/rpmsg/rpmsg_internal.h b/drivers/rpmsg/rpmsg_internal.h index b1245d3ed7c6..c7bd0a3c802d 100644 --- a/drivers/rpmsg/rpmsg_internal.h +++ b/drivers/rpmsg/rpmsg_internal.h @@ -92,10 +92,19 @@ int rpmsg_release_channel(struct rpmsg_device *rpdev, */ static inline int rpmsg_chrdev_register_device(struct rpmsg_device *rpdev) { + int ret; + strcpy(rpdev->id.name, "rpmsg_chrdev"); - rpdev->driver_override = "rpmsg_chrdev"; + ret = driver_set_override(&rpdev->dev, &rpdev->driver_override, + "rpmsg_chrdev"); + if (ret) + return ret; + + ret = rpmsg_register_device(rpdev); + if (ret) + kfree(rpdev->driver_override); - return rpmsg_register_device(rpdev); + return ret; } #endif diff --git a/drivers/rpmsg/rpmsg_ns.c b/drivers/rpmsg/rpmsg_ns.c index 762ff1ae279f..1c9f9cf065b0 100644 --- a/drivers/rpmsg/rpmsg_ns.c +++ b/drivers/rpmsg/rpmsg_ns.c @@ -20,12 +20,22 @@ */ int rpmsg_ns_register_device(struct rpmsg_device *rpdev) { + int ret; + strcpy(rpdev->id.name, "rpmsg_ns"); - rpdev->driver_override = "rpmsg_ns"; + ret = driver_set_override(&rpdev->dev, &rpdev->driver_override, + "rpmsg_ns"); + if (ret) + return ret; + rpdev->src = RPMSG_NS_ADDR; rpdev->dst = RPMSG_NS_ADDR; - return rpmsg_register_device(rpdev); + ret = rpmsg_register_device(rpdev); + if (ret) + kfree(rpdev->driver_override); + + return ret; } EXPORT_SYMBOL(rpmsg_ns_register_device);