From patchwork Sat Jun 13 21:59:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: wu000273@umn.edu X-Patchwork-Id: 1308779 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=umn.edu Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=umn.edu header.i=@umn.edu header.a=rsa-sha256 header.s=google header.b=ZClCkewZ; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49ks2K02Wzz9sRW for ; Sun, 14 Jun 2020 07:59:36 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726442AbgFMV7b (ORCPT ); Sat, 13 Jun 2020 17:59:31 -0400 Received: from mta-p7.oit.umn.edu ([134.84.196.207]:50738 "EHLO mta-p7.oit.umn.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726272AbgFMV7b (ORCPT ); Sat, 13 Jun 2020 17:59:31 -0400 Received: from localhost (unknown [127.0.0.1]) by mta-p7.oit.umn.edu (Postfix) with ESMTP id 49ks2B53jyz9vYxJ for ; Sat, 13 Jun 2020 21:59:30 +0000 (UTC) X-Virus-Scanned: amavisd-new at umn.edu Received: from mta-p7.oit.umn.edu ([127.0.0.1]) by localhost (mta-p7.oit.umn.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id OXiYf32DdzRl for ; Sat, 13 Jun 2020 16:59:30 -0500 (CDT) Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mta-p7.oit.umn.edu (Postfix) with ESMTPS id 49ks2B3Pkrz9vYx0 for ; Sat, 13 Jun 2020 16:59:30 -0500 (CDT) DMARC-Filter: OpenDMARC Filter v1.3.2 mta-p7.oit.umn.edu 49ks2B3Pkrz9vYx0 DKIM-Filter: OpenDKIM Filter v2.11.0 mta-p7.oit.umn.edu 49ks2B3Pkrz9vYx0 Received: by mail-il1-f200.google.com with SMTP id x63so9140030ilk.8 for ; Sat, 13 Jun 2020 14:59:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=umn.edu; s=google; h=from:to:cc:subject:date:message-id; bh=41c7FVjnuZxspya187rlx7OBSjVWB+zOwPrRB+ZgQSg=; b=ZClCkewZT10IFwgu68fiRQ0a2lUNssxCW8Qpwbz1BlQQD9oo8RsEMk+B6NXFRWyjAR G78hU9OGxRfC4up3QAteuRz5aiuxkQ8Ll64R9AxKIwttWPAnrnmXomK4nRuaAGD2Ka6T eE0OIsZ0pHhG5bVrjTLwEbgdxG+V9gNKj3gwO4U0oNq3mxaYZb9n+lb1thduT55wQock xRgRORglF9rM6zbJa60dU9T7cQ/tCIqV+E8kYCq0YV/S4ZcPMBhCqUGuzBYWT8oxCivW ypVEGDWcM9GBGIjHClhYdXGsdYp5QWCWIP5rRfA661NNizK7nUMU3aqnMOCufYCeIEcA zaag== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=41c7FVjnuZxspya187rlx7OBSjVWB+zOwPrRB+ZgQSg=; b=XFDdrMe7+15RgR1xgVNzdLGhXvLdYDByyQcp250HJLoR/HqgL1ccM81MhA03//KrUc ySEsoI1MkJ0a15AkLEtr3GgZ+R0nVQz82ulHUlI4LSDSkQqs5bx4vrDyS4H4CGJCVZdk xBdAMssRu8E9AGlHdM8+Kzn4km+pGP94xU1hpgz7x8SjcZCaeU6cB9uYAhc2YNHPTm6F 5yvL1rw+gUks/ey6SVpTfurJBTkOm2lXde5eObeCFP+8YR/POx2qwti3F831lFvn+m7H 1yV2QGeY7RlcnfLhf06DYTV9A9IxldmUUJkVu+DMByhDuA7WX86PJ7w5dlBrCrfgB0Yj IGRA== X-Gm-Message-State: AOAM533NOkzqAbcAy1qWV6VEm8kUSaLagH4ynamNvUuJCcpVlFXaC9f5 8nnK1owjk//iKtKPq07OQT2RAjhtbrCWPVTcjA8Il8MfTAZTRxTw31mYyXigPmf84pgFq8Aobe+ MOyEJlk+qGPpEFaFPFNGfzV13 X-Received: by 2002:a5d:87c4:: with SMTP id q4mr20721683ios.169.1592085569968; Sat, 13 Jun 2020 14:59:29 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzipdRZykMqI9KaxMvFY/GNQReGYjPRPDqXiZP3a3gDErwMDUCI4tYTOc9XVtuyQfZVY4AYBg== X-Received: by 2002:a5d:87c4:: with SMTP id q4mr20721663ios.169.1592085569733; Sat, 13 Jun 2020 14:59:29 -0700 (PDT) Received: from qiushi.cs.umn.edu ([2607:ea00:101:3c74:4874:45:bcb4:df60]) by smtp.gmail.com with ESMTPSA id t12sm5321589ilj.75.2020.06.13.14.59.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 13 Jun 2020 14:59:29 -0700 (PDT) From: wu000273@umn.edu To: kjlu@umn.edu Cc: wu000273@umn.edu, Michal Simek , Rob Herring , Wolfram Sang , Shubhrajyoti Datta , linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] i2c: xiic: Fix reference count leaks. Date: Sat, 13 Jun 2020 16:59:23 -0500 Message-Id: <20200613215923.2611-1-wu000273@umn.edu> X-Mailer: git-send-email 2.17.1 Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org From: Qiushi Wu pm_runtime_get_sync() increments the runtime PM usage counter even when it returns an error code. Thus call pm_runtime_put_noidle() if pm_runtime_get_sync() fails. Fixes: 36ecbcab84d0 ("i2c: xiic: Implement power management") Signed-off-by: Qiushi Wu --- drivers/i2c/busses/i2c-xiic.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/busses/i2c-xiic.c b/drivers/i2c/busses/i2c-xiic.c index 90c1c362394d..ffec41e6be72 100644 --- a/drivers/i2c/busses/i2c-xiic.c +++ b/drivers/i2c/busses/i2c-xiic.c @@ -696,8 +696,10 @@ static int xiic_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) xiic_getreg8(i2c, XIIC_SR_REG_OFFSET)); err = pm_runtime_get_sync(i2c->dev); - if (err < 0) + if (err < 0) { + pm_runtime_put_noidle(i2c->dev); return err; + } err = xiic_busy(i2c); if (err) @@ -860,8 +862,10 @@ static int xiic_i2c_remove(struct platform_device *pdev) i2c_del_adapter(&i2c->adap); ret = pm_runtime_get_sync(i2c->dev); - if (ret < 0) + if (ret < 0) { + pm_runtime_put_noidle(i2c->dev); return ret; + } xiic_deinit(i2c); pm_runtime_put_sync(i2c->dev);