From patchwork Fri Mar 17 18:48:14 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 740489 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3vlF8V1hstz9ryj for ; Sat, 18 Mar 2017 06:02:34 +1100 (AEDT) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="J3Oj9SAj"; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=infradead.org header.i=@infradead.org header.b="VvcZ19ge"; dkim-atps=neutral DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Subject:References: In-Reply-To:Message-Id:Date:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ez6cLA8uUKbt0eVg6xmZaGLonrwXvbYEKe9GyMEna5c=; b=J3Oj9SAjkSyysk ZGaiiOk3d0ShwISU5H+5OGg1OSgevdozP2R7LugEsIwAKDBUoHTi4DsrI8hs/enUiIMe7bQcGmwAm yb7CGIdoqZIloxH1bGStfkKhHT9dlygegmTi7qKWfRgh9XKEto8RMBtUvY2QFJVKUXsixfFL8uTIB zIR58HBoQ0Vfx5uSCBl4PoR3MoKS5BfcIzplwqMjaL1xyJZjLzwKTI57TOb/mWsUIRWhlF0h089/L R3QDt4Q9ijdhfLeeYTN17zRuOpJuYUKDp3QqmnMIZ4i5lOTmnw4LyOy/V3iBD/PqWskgTIYVUe+cj VbpYj/SDSazFpe2GM/fw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cox8r-00033s-GR; Fri, 17 Mar 2017 19:02:25 +0000 Received: from casper.infradead.org ([2001:770:15f::2]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cowxI-00042n-OY for linux-mtd@bombadil.infradead.org; Fri, 17 Mar 2017 18:50:29 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Subject:References:In-Reply-To: Message-Id:Date:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=hIa6Y8jg3uWutJRG/3A/v9ynTd+WAYDPIt74wG+CPTc=; b=VvcZ19genMHdvya2kMmO36DZD ITElgUXTcQ2Xscdw88ZjsDQr656ux6Z4C+rJrFNPpKXYNMR9Zq2jE8SPNzNzsDo4GmjPBXvWkeqfR MiBxMQQRRLAFIMGhs9ZzjriNNApkTa7mFC84d4Ti2H35Kva+sloYQWSRUWaXAKZb1bR2h8F7ifHUJ 01QZjlUtax3pIvYc0d0Brft63ubtXfm8KL8BZ7hQOX0k7u5C1ENGBUvFyuAWS4rX31iXkHNiCk6h8 yDCgbO/UNg03U2S6Gl02pisxu+MaVNfi387OHbsFMJ+/sdKyt2bX3B1EjfJlyXHMl5C1cAckW2OmP h2V9jDrzg==; Received: from ale.deltatee.com ([207.54.116.67]) by casper.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cowxF-0005mG-BZ for linux-mtd@lists.infradead.org; Fri, 17 Mar 2017 18:50:26 +0000 Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.84_2) (envelope-from ) id 1cowvs-0002ZE-Sf; Fri, 17 Mar 2017 12:49:05 -0600 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.84_2) (envelope-from ) id 1cowvp-0000qG-M8; Fri, 17 Mar 2017 12:48:57 -0600 From: Logan Gunthorpe To: Greg Kroah-Hartman , Dan Williams , Hans Verkuil , Alexander Viro , Alexandre Belloni , Jason Gunthorpe , Johannes Thumshirn , Dmitry Torokhov , Linus Walleij , Jarkko Sakkinen , "James E.J. Bottomley" , "Martin K. Petersen" , David Woodhouse , Brian Norris , Boris Brezillon , Marek Vasut , Cyrille Pitchen Date: Fri, 17 Mar 2017 12:48:14 -0600 Message-Id: <1489776503-3151-8-git-send-email-logang@deltatee.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1489776503-3151-1-git-send-email-logang@deltatee.com> References: <1489776503-3151-1-git-send-email-logang@deltatee.com> X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: gregkh@linuxfoundation.org, dan.j.williams@intel.com, hans.verkuil@cisco.com, viro@zeniv.linux.org.uk, jgunthorpe@obsidianresearch.com, jthumshirn@suse.de, linus.walleij@linaro.org, jarkko.sakkinen@linux.intel.com, jejb@linux.vnet.ibm.com, martin.petersen@oracle.com, dwmw2@infradead.org, alexandre.belloni@free-electrons.com, boris.brezillon@free-electrons.com, dmitry.torokhov@gmail.com, computersforpeace@gmail.com, marek.vasut@gmail.com, cyrille.pitchen@atmel.com, rtc-linux@googlegroups.com, linux-mtd@lists.infradead.org, linux-nvdimm@lists.01.org, linux-pci@vger.kernel.org, linux-scsi@vger.kernel.org, linux-media@vger.kernel.org, linux-iio@vger.kernel.org, linux-rdma@vger.kernel.org, linux-gpio@vger.kernel.org, linux-input@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, logang@deltatee.com X-SA-Exim-Mail-From: gunthorp@deltatee.com X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on ale.deltatee.com X-Spam-Level: X-Spam-Status: No, score=-8.5 required=5.0 tests=ALL_TRUSTED,BAYES_00, GREYLIST_ISWHITE, MYRULES_FREE, MYRULES_NO_TEXT, RP_MATCHES_RCVD autolearn=ham autolearn_force=no version=3.4.0 Subject: [PATCH v5 07/16] platform/chrome: cros_ec_dev - utilize new cdev_device_add helper function X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170317_185025_552140_EF4B4F49 X-CRM114-Status: GOOD ( 18.12 ) X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.4.1 on casper.infradead.org summary: Content analysis details: (-1.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-scsi@vger.kernel.org, rtc-linux@googlegroups.com, linux-gpio@vger.kernel.org, linux-iio@vger.kernel.org, linux-pci@vger.kernel.org, linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, linux-mtd@lists.infradead.org, linux-input@vger.kernel.org, linux-fsdevel@vger.kernel.org, Logan Gunthorpe , linux-media@vger.kernel.org MIME-Version: 1.0 Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Replace the open coded registration of the cdev and dev with the new device_add_cdev() helper. The helper replaces a common pattern by taking the proper reference against the parent device and adding both the cdev and the device. At the same time we cleanup the error path through device_probe function: we use put_device instead of kfree directly as recommended by the device_initialize documentation. Signed-off-by: Logan Gunthorpe --- drivers/platform/chrome/cros_ec_dev.c | 31 +++++++------------------------ 1 file changed, 7 insertions(+), 24 deletions(-) diff --git a/drivers/platform/chrome/cros_ec_dev.c b/drivers/platform/chrome/cros_ec_dev.c index 6f09da4..6aa120c 100644 --- a/drivers/platform/chrome/cros_ec_dev.c +++ b/drivers/platform/chrome/cros_ec_dev.c @@ -391,7 +391,6 @@ static int ec_device_probe(struct platform_device *pdev) int retval = -ENOMEM; struct device *dev = &pdev->dev; struct cros_ec_platform *ec_platform = dev_get_platdata(dev); - dev_t devno = MKDEV(ec_major, pdev->id); struct cros_ec_dev *ec = kzalloc(sizeof(*ec), GFP_KERNEL); if (!ec) @@ -407,23 +406,11 @@ static int ec_device_probe(struct platform_device *pdev) cdev_init(&ec->cdev, &fops); /* - * Add the character device - * Link cdev to the class device to be sure device is not used - * before unbinding it. - */ - ec->cdev.kobj.parent = &ec->class_dev.kobj; - retval = cdev_add(&ec->cdev, devno, 1); - if (retval) { - dev_err(dev, ": failed to add character device\n"); - goto cdev_add_failed; - } - - /* * Add the class device * Link to the character device for creating the /dev entry * in devtmpfs. */ - ec->class_dev.devt = ec->cdev.dev; + ec->class_dev.devt = MKDEV(ec_major, pdev->id); ec->class_dev.class = &cros_class; ec->class_dev.parent = dev; ec->class_dev.release = __remove; @@ -431,13 +418,13 @@ static int ec_device_probe(struct platform_device *pdev) retval = dev_set_name(&ec->class_dev, "%s", ec_platform->ec_name); if (retval) { dev_err(dev, "dev_set_name failed => %d\n", retval); - goto set_named_failed; + goto failed; } - retval = device_add(&ec->class_dev); + retval = cdev_device_add(&ec->cdev, &ec->class_dev); if (retval) { - dev_err(dev, "device_register failed => %d\n", retval); - goto dev_reg_failed; + dev_err(dev, "cdev_device_add failed => %d\n", retval); + goto failed; } /* check whether this EC is a sensor hub. */ @@ -446,12 +433,8 @@ static int ec_device_probe(struct platform_device *pdev) return 0; -dev_reg_failed: -set_named_failed: - dev_set_drvdata(dev, NULL); - cdev_del(&ec->cdev); -cdev_add_failed: - kfree(ec); +failed: + put_device(&ec->class_dev); return retval; }