From patchwork Tue Apr 5 05:28:35 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Agner X-Patchwork-Id: 8747371 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id E61A09F36E for ; Tue, 5 Apr 2016 05:28:09 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C90F820225 for ; Tue, 5 Apr 2016 05:28:07 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id ED57D201ED for ; Tue, 5 Apr 2016 05:28:06 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 507A76E6DF; Tue, 5 Apr 2016 05:28:06 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail.kmu-office.ch (mail.kmu-office.ch [IPv6:2a02:418:6a02::a2]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7B6966E6DB for ; Tue, 5 Apr 2016 05:28:04 +0000 (UTC) Received: from trochilidae.localdomain (unknown [98.180.145.120]) by mail.kmu-office.ch (Postfix) with ESMTPSA id A514E5C158D; Tue, 5 Apr 2016 07:26:47 +0200 (CEST) From: Stefan Agner To: dri-devel@lists.freedesktop.org, shawnguo@kernel.org, stefan@agner.ch Subject: [PATCH v3 3/9] drm/fsl-dcu: disable clock on initialization failure and remove Date: Mon, 4 Apr 2016 22:28:35 -0700 Message-Id: <1459834121-25997-4-git-send-email-stefan@agner.ch> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1459834121-25997-1-git-send-email-stefan@agner.ch> References: <1459834121-25997-1-git-send-email-stefan@agner.ch> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=agner.ch; s=dkim; t=1459834011; bh=5PgQgyYm+yI0HJcM07iggbTpfm0Ipwic6JtX2wkqxfo=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=UfAjU+RUfTvRkY1pT3Dvw1lsLf4EEaKRzofCLY0pwcTDhbK8NCx5i6UlS6mPwJgzFVfLU49/NQMoBOeP6z7Vr/A8WhMque+gySIEP2PK/wAHbiQjVDmJ3Wsvzh8JvhUehyWn3wfljTJoEQqxBqlW1PgBEV2UlONCKI0q4cl26bw= Cc: meng.yi@nxp.com, pawel.moll@arm.com, alison.wang@freescale.com, daniel.vetter@ffwll.ch, mturquette@baylibre.com, ijc+devicetree@hellion.org.uk, sboyd@codeaurora.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, robh+dt@kernel.org, kernel@pengutronix.de, galak@codeaurora.org, mark.rutland@arm.com, linux-arm-kernel@lists.infradead.org, alexander.stein@systec-electronic.com X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Spam-Status: No, score=-5.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Fix error handling during probe by reordering initialization and adding a error path which disables clock again. Also disable the clock on remove. Signed-off-by: Stefan Agner --- drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c | 44 +++++++++++++++---------------- 1 file changed, 21 insertions(+), 23 deletions(-) diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c index e8d9337..f2a9c1b 100644 --- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c +++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c @@ -290,6 +290,11 @@ static int fsl_dcu_drm_probe(struct platform_device *pdev) if (!fsl_dev) return -ENOMEM; + id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node); + if (!id) + return -ENODEV; + fsl_dev->soc = id->data; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(dev, "could not get memory IO resource\n"); @@ -308,39 +313,29 @@ static int fsl_dcu_drm_probe(struct platform_device *pdev) return -ENXIO; } + fsl_dev->regmap = devm_regmap_init_mmio(dev, base, + &fsl_dcu_regmap_config); + if (IS_ERR(fsl_dev->regmap)) { + dev_err(dev, "regmap init failed\n"); + return PTR_ERR(fsl_dev->regmap); + } + fsl_dev->clk = devm_clk_get(dev, "dcu"); if (IS_ERR(fsl_dev->clk)) { - ret = PTR_ERR(fsl_dev->clk); dev_err(dev, "failed to get dcu clock\n"); - return ret; - } - ret = clk_prepare(fsl_dev->clk); - if (ret < 0) { - dev_err(dev, "failed to prepare dcu clk\n"); - return ret; + return PTR_ERR(fsl_dev->clk); } - ret = clk_enable(fsl_dev->clk); + ret = clk_prepare_enable(fsl_dev->clk); if (ret < 0) { dev_err(dev, "failed to enable dcu clk\n"); - clk_unprepare(fsl_dev->clk); return ret; } - fsl_dev->regmap = devm_regmap_init_mmio(dev, base, - &fsl_dcu_regmap_config); - if (IS_ERR(fsl_dev->regmap)) { - dev_err(dev, "regmap init failed\n"); - return PTR_ERR(fsl_dev->regmap); - } - - id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node); - if (!id) - return -ENODEV; - fsl_dev->soc = id->data; - drm = drm_dev_alloc(driver, dev); - if (!drm) - return -ENOMEM; + if (!drm) { + ret = -ENOMEM; + goto disable_clk; + } fsl_dev->dev = dev; fsl_dev->drm = drm; @@ -360,6 +355,8 @@ static int fsl_dcu_drm_probe(struct platform_device *pdev) unref: drm_dev_unref(drm); +disable_clk: + clk_disable_unprepare(fsl_dev->clk); return ret; } @@ -367,6 +364,7 @@ static int fsl_dcu_drm_remove(struct platform_device *pdev) { struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev); + clk_disable_unprepare(fsl_dev->clk); drm_put_dev(fsl_dev->drm); return 0;