From patchwork Wed Dec 8 16:40:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Biju Das X-Patchwork-Id: 522417 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6FA96C433F5 for ; Wed, 8 Dec 2021 16:40:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234763AbhLHQns (ORCPT ); Wed, 8 Dec 2021 11:43:48 -0500 Received: from relmlor1.renesas.com ([210.160.252.171]:38284 "EHLO relmlie5.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S234715AbhLHQns (ORCPT ); Wed, 8 Dec 2021 11:43:48 -0500 X-IronPort-AV: E=Sophos;i="5.88,190,1635174000"; d="scan'208";a="102820885" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie5.idc.renesas.com with ESMTP; 09 Dec 2021 01:40:15 +0900 Received: from localhost.localdomain (unknown [10.226.92.71]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id A22B7400F7AA; Thu, 9 Dec 2021 01:40:12 +0900 (JST) From: Biju Das To: Philipp Zabel Cc: Biju Das , "Rafael J. Wysocki" , Daniel Lezcano , Amit Kucheria , Zhang Rui , linux-pm@vger.kernel.org, Geert Uytterhoeven , Chris Paterson , Biju Das , Prabhakar Mahadev Lad , linux-renesas-soc@vger.kernel.org Subject: [PATCH v2] thermal/drivers: Add error check for reset_control_deassert() Date: Wed, 8 Dec 2021 16:40:09 +0000 Message-Id: <20211208164010.4130-1-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.17.1 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org If reset_control_deassert() fails, then we won't be able to access the device registers. Therefore check the return code of reset_control_deassert() and bail out in case of error. While at it replace the parameter "&pdev->dev" -> "dev" in devm_reset_control_get_exclusive(). Suggested-by: Philipp Zabel Signed-off-by: Biju Das Reviewed-by: Philipp Zabel --- v1->v2: * removed the cast operation "PTR_ERR(ret)" -> ret * Added Rb tag from Philipp. --- drivers/thermal/rzg2l_thermal.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/thermal/rzg2l_thermal.c b/drivers/thermal/rzg2l_thermal.c index d47d4a30cd6c..7a9cdc1f37ca 100644 --- a/drivers/thermal/rzg2l_thermal.c +++ b/drivers/thermal/rzg2l_thermal.c @@ -170,12 +170,14 @@ static int rzg2l_thermal_probe(struct platform_device *pdev) return PTR_ERR(priv->base); priv->dev = dev; - priv->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL); + priv->rstc = devm_reset_control_get_exclusive(dev, NULL); if (IS_ERR(priv->rstc)) return dev_err_probe(dev, PTR_ERR(priv->rstc), "failed to get cpg reset"); - reset_control_deassert(priv->rstc); + ret = reset_control_deassert(priv->rstc); + if (ret) + return dev_err_probe(dev, ret, "failed to deassert"); pm_runtime_enable(dev); pm_runtime_get_sync(dev);