From patchwork Mon Aug 17 15:11:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 266053 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 80C5FC433E3 for ; Mon, 17 Aug 2020 19:11:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 619912072E for ; Mon, 17 Aug 2020 19:11:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597691489; bh=K1Ma8cAdRm4cq5FiYwAP+gpk459mF5A3ggKalD13s7U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=oKIQAtDchNbCMHQnw8nBsFu/ik/UFBemsSJGNL+Lp6Wv/NsWRCIhS/MHk4z/M0T58 cPb/9ScR7AvsWx1ky8Dwfe4nxzqgNQ71vbExdRzBp91kXm36UKc3UjNSgaoOTEWPBD b2VGoelcDlW/EAZZ21yZdbhPeIbQSGCvEE2mXU5s= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731705AbgHQTL0 (ORCPT ); Mon, 17 Aug 2020 15:11:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:50488 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730716AbgHQPlI (ORCPT ); Mon, 17 Aug 2020 11:41:08 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DF7C120825; Mon, 17 Aug 2020 15:41:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597678868; bh=K1Ma8cAdRm4cq5FiYwAP+gpk459mF5A3ggKalD13s7U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0y5y9z0g5wHE9RfdzPupqS8rhx+uz5mpTxt0e3yMYfK2i/UCFc83bQmRa9Pc93L3u NKDRuaEjXymQCK04emfMT92pkGNEFR5JWR/GR+05jvii/Cf552B71HsStfD7zSfZ4x fkvd5+6JDbUgb86rApw9o4i5X8uSJ9zq0w5+g2Rs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Christophe JAILLET , Thierry Reding , Sasha Levin Subject: [PATCH 5.7 018/393] memory: tegra: Fix an error handling path in tegra186_emc_probe() Date: Mon, 17 Aug 2020 17:11:08 +0200 Message-Id: <20200817143820.472375761@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200817143819.579311991@linuxfoundation.org> References: <20200817143819.579311991@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Christophe JAILLET [ Upstream commit c3d4eb3bf6ad32466555b31094f33a299444f795 ] The call to tegra_bpmp_get() must be balanced by a call to tegra_bpmp_put() in case of error, as already done in the remove function. Add an error handling path and corresponding goto. Fixes: 52d15dd23f0b ("memory: tegra: Support DVFS on Tegra186 and later") Signed-off-by: Christophe JAILLET Signed-off-by: Thierry Reding Signed-off-by: Sasha Levin --- drivers/memory/tegra/tegra186-emc.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/drivers/memory/tegra/tegra186-emc.c b/drivers/memory/tegra/tegra186-emc.c index 97f26bc77ad41..c900948881d5b 100644 --- a/drivers/memory/tegra/tegra186-emc.c +++ b/drivers/memory/tegra/tegra186-emc.c @@ -185,7 +185,7 @@ static int tegra186_emc_probe(struct platform_device *pdev) if (IS_ERR(emc->clk)) { err = PTR_ERR(emc->clk); dev_err(&pdev->dev, "failed to get EMC clock: %d\n", err); - return err; + goto put_bpmp; } platform_set_drvdata(pdev, emc); @@ -201,7 +201,7 @@ static int tegra186_emc_probe(struct platform_device *pdev) err = tegra_bpmp_transfer(emc->bpmp, &msg); if (err < 0) { dev_err(&pdev->dev, "failed to EMC DVFS pairs: %d\n", err); - return err; + goto put_bpmp; } emc->debugfs.min_rate = ULONG_MAX; @@ -211,8 +211,10 @@ static int tegra186_emc_probe(struct platform_device *pdev) emc->dvfs = devm_kmalloc_array(&pdev->dev, emc->num_dvfs, sizeof(*emc->dvfs), GFP_KERNEL); - if (!emc->dvfs) - return -ENOMEM; + if (!emc->dvfs) { + err = -ENOMEM; + goto put_bpmp; + } dev_dbg(&pdev->dev, "%u DVFS pairs:\n", emc->num_dvfs); @@ -237,7 +239,7 @@ static int tegra186_emc_probe(struct platform_device *pdev) "failed to set rate range [%lu-%lu] for %pC\n", emc->debugfs.min_rate, emc->debugfs.max_rate, emc->clk); - return err; + goto put_bpmp; } emc->debugfs.root = debugfs_create_dir("emc", NULL); @@ -254,6 +256,10 @@ static int tegra186_emc_probe(struct platform_device *pdev) emc, &tegra186_emc_debug_max_rate_fops); return 0; + +put_bpmp: + tegra_bpmp_put(emc->bpmp); + return err; } static int tegra186_emc_remove(struct platform_device *pdev)