From patchwork Sat Feb 24 22:44:23 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tobias Jordan X-Patchwork-Id: 877476 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=elektrobit.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3zpjwd1jC3z9sWK for ; Sun, 25 Feb 2018 09:50:25 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751487AbeBXWuW (ORCPT ); Sat, 24 Feb 2018 17:50:22 -0500 Received: from agrajag.zerfleddert.de ([88.198.237.222]:33284 "EHLO agrajag.zerfleddert.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751463AbeBXWuU (ORCPT ); Sat, 24 Feb 2018 17:50:20 -0500 X-Greylist: delayed 461 seconds by postgrey-1.27 at vger.kernel.org; Sat, 24 Feb 2018 17:50:20 EST Received: by agrajag.zerfleddert.de (Postfix, from userid 1000) id 927C25B20AE8; Sat, 24 Feb 2018 23:44:23 +0100 (CET) Date: Sat, 24 Feb 2018 23:44:23 +0100 From: Tobias Jordan To: linux-i2c@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Laxman Dewangan , Wolfram Sang , Thierry Reding , Jonathan Hunter Subject: [PATCH] i2c: tegra: Fix PM device usage count Message-ID: <20180224224423.hz36gpxnlpex2cqx@agrajag.zerfleddert.de> MIME-Version: 1.0 Content-Disposition: inline User-Agent: NeoMutt/20170113 (1.7.2) Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org pm_runtime_get_sync() increases the device's usage count even when reporting an error, so add a call to pm_runtime_put_noidle() in the related error branches. Fixes: 1f50ad2c86cd ("i2c: tegra: Add runtime power-management support") Signed-off-by: Tobias Jordan Acked-by: Thierry Reding --- This is one of a number of patches for problems found using coccinelle scripting in the SIL2LinuxMP project. The patch has been compile-tested; it's based on linux-next-20180223. For a discussion of the corresponding issue, see https://marc.info/?l=linux-pm&m=151904483924999&w=2 drivers/i2c/busses/i2c-tegra.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index 60292d243e24..d53136538339 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -484,6 +484,7 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev) err = pm_runtime_get_sync(i2c_dev->dev); if (err < 0) { dev_err(i2c_dev->dev, "runtime resume failed %d\n", err); + pm_runtime_put_noidle(i2c_dev->dev); return err; } @@ -740,6 +741,7 @@ static int tegra_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], ret = pm_runtime_get_sync(i2c_dev->dev); if (ret < 0) { dev_err(i2c_dev->dev, "runtime resume failed %d\n", ret); + pm_runtime_put_noidle(i2c_dev->dev); return ret; }