From patchwork Mon Jan 6 01:04:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 1217875 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-tegra-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="I6Ki5BoP"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 47rckP4T4kz9sS3 for ; Mon, 6 Jan 2020 12:05:17 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727286AbgAFBEl (ORCPT ); Sun, 5 Jan 2020 20:04:41 -0500 Received: from mail-lj1-f194.google.com ([209.85.208.194]:40650 "EHLO mail-lj1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727234AbgAFBEj (ORCPT ); Sun, 5 Jan 2020 20:04:39 -0500 Received: by mail-lj1-f194.google.com with SMTP id u1so49239566ljk.7; Sun, 05 Jan 2020 17:04:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=MxLj3sMjbJSVDQh/qIpP3HDKKCaIdKkelMGqwQ8Ieqs=; b=I6Ki5BoPWAcfM+TfD12ObY2TbIQfDLD8A7z61IlEYyCOZiYpYnEc1PrN+LHrg5BVcj oF5yiREAfEmBHvIvJIZydKSiFrugl8ggo70nezDXG02PtaUwRMtZfbT5IKrpslk7jlKs 4YybKlIYP7TYNCIfGJo2hZFw8F20qupQqcvMrFbXvPQ3xZTldo7bvM5cPOPQlP3AGFsE +H4yt1W0YTxZkc+2qLRAT2LYkwaf1ytNapz0mCmm0/yUyPmY6BRIUsvz1M9fwhy4Bw23 7CrB7wsJExk9/u/xS0EskRrOKHJM54b6B6Q7MVx/AptTDtVMbqEEiBYTjnwUdi8XdtLM qCFQ== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=MxLj3sMjbJSVDQh/qIpP3HDKKCaIdKkelMGqwQ8Ieqs=; b=N3as4VyO36zoLmADEIVHX7bZ/1CQPy19E/AJb/XQImUayWE9egleO3as/OfyTTha6c VCxCW27JNWjrxhUjM48XFUDAF2KPVWwxeGfcPwPcsQiqhRaGReEcLnndSCAopGBvRO+M 3LlUOnyy3buvUvKH7GLW9KmQzxIZJIncT4e72DXLo3B2GppVcD1n+N8tr/A3g2GFuKSm ffxqKjwjhKsE7vvt2os44Vgexob75y7+V95kormlfu4Nu8mbPJYTnSFXeb2yd3czDqdp aAEOmbp4j54bCJRjNbdXB+rBPq5OhjA4EKYF5AGetBIX2ZbsJKtuI0fGl1/VbtUMd2OV VlHw== X-Gm-Message-State: APjAAAXB6F24ybNHvNFnv3qhaJ1fdlKL/JWh8OKI8RyKSQ8XO6PF/zIR dXX1Dqb6KaNeCW3bPqWNNZE= X-Google-Smtp-Source: APXvYqyOkVuuHQs3q/GyV5ekJX3GMfanNZhCG7cyLMbrKglLRQINhKzdEoh5inYz73gjtMqjbHZVBg== X-Received: by 2002:a2e:96c6:: with SMTP id d6mr28874929ljj.4.1578272677744; Sun, 05 Jan 2020 17:04:37 -0800 (PST) Received: from localhost.localdomain (79-139-233-37.dynamic.spd-mgts.ru. [79.139.233.37]) by smtp.gmail.com with ESMTPSA id a19sm28245910ljb.103.2020.01.05.17.04.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 05 Jan 2020 17:04:37 -0800 (PST) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Laxman Dewangan , Mikko Perttunen , Wolfram Sang Cc: linux-i2c@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 2/9] i2c: tegra: Properly disable runtime PM on driver's probe error Date: Mon, 6 Jan 2020 04:04:16 +0300 Message-Id: <20200106010423.5890-3-digetx@gmail.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20200106010423.5890-1-digetx@gmail.com> References: <20200106010423.5890-1-digetx@gmail.com> MIME-Version: 1.0 Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org One of the recent Tegra I2C commits made a change that resumes runtime PM during driver's probe, but it missed to put the RPM in a case of error. Note that it's not correct to use pm_runtime_status_suspended because it breaks RPM refcounting. Fixes: 8ebf15e9c869 ("i2c: tegra: Move suspend handling to NOIRQ phase") Signed-off-by: Dmitry Osipenko Tested-by: Thierry Reding --- drivers/i2c/busses/i2c-tegra.c | 29 +++++++++++++++++++---------- 1 file changed, 19 insertions(+), 10 deletions(-) diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index 79d19f6ce94e..61339c665ebd 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -1608,14 +1608,18 @@ static int tegra_i2c_probe(struct platform_device *pdev) } pm_runtime_enable(&pdev->dev); - if (!pm_runtime_enabled(&pdev->dev)) + if (!pm_runtime_enabled(&pdev->dev)) { ret = tegra_i2c_runtime_resume(&pdev->dev); - else + if (ret < 0) { + dev_err(&pdev->dev, "runtime resume failed\n"); + goto unprepare_div_clk; + } + } else { ret = pm_runtime_get_sync(i2c_dev->dev); - - if (ret < 0) { - dev_err(&pdev->dev, "runtime resume failed\n"); - goto unprepare_div_clk; + if (ret < 0) { + dev_err(&pdev->dev, "runtime resume failed\n"); + goto disable_rpm; + } } if (i2c_dev->is_multimaster_mode) { @@ -1623,7 +1627,7 @@ static int tegra_i2c_probe(struct platform_device *pdev) if (ret < 0) { dev_err(i2c_dev->dev, "div_clk enable failed %d\n", ret); - goto disable_rpm; + goto put_rpm; } } @@ -1671,11 +1675,16 @@ static int tegra_i2c_probe(struct platform_device *pdev) if (i2c_dev->is_multimaster_mode) clk_disable(i2c_dev->div_clk); -disable_rpm: - pm_runtime_disable(&pdev->dev); - if (!pm_runtime_status_suspended(&pdev->dev)) +put_rpm: + if (pm_runtime_enabled(&pdev->dev)) + pm_runtime_put_sync(&pdev->dev); + else tegra_i2c_runtime_suspend(&pdev->dev); +disable_rpm: + if (pm_runtime_enabled(&pdev->dev)) + pm_runtime_disable(&pdev->dev); + unprepare_div_clk: clk_unprepare(i2c_dev->div_clk);