From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.5 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 B7658C433DF for ; Fri, 5 Jun 2020 03:32:51 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 877A0207ED for ; Fri, 5 Jun 2020 03:32:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="ZxPKvl70"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="MiErTzza" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 877A0207ED Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Owner; bh=+8cRVOCFyYCJJXfDJwc69jDHCpPUDgo760Dg24cDKPI=; b=ZxP Kvl70TLgBw3igFStEiwX7GrcZLNJyxsO6v0GYh9hM5OMwh5urswkdoea9UMM5ezi35Ex34fDBywD+ o0L0JLs2Ld57yWoodHGc8yCQRcEx5skaZB6uVCeGRZ0m9n5vpwf24t1tzlCSFGSXY84nh4CnUv7mq L+bGr7KZu8YZ19kvCBlUmuH5PaPk41jp/teNsZNWtYEwUse89dvCajJBISUNZDF3vwYOXwc195hNi UbCmSRJI+qPudtNdOCRiuuabV9sROy6b3kJ9lvc6/0mfihekSkXwFBx0trew+S37LTi31Q2y6qnPq EJx2iwA7rAkg2+JDa+kGh6A5uzJq9xw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jh36A-0006tk-IN; Fri, 05 Jun 2020 03:32:50 +0000 Received: from mail-io1-xd43.google.com ([2607:f8b0:4864:20::d43]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jh366-0006s8-Ua for linux-arm-kernel@lists.infradead.org; Fri, 05 Jun 2020 03:32:48 +0000 Received: by mail-io1-xd43.google.com with SMTP id y5so8726757iob.12 for ; Thu, 04 Jun 2020 20:32:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=IJPenuFpVQx0seln/2dhfFsuGNNRm+UZljRAm/AqGEU=; b=MiErTzzaT/PL3m/OS3OyrwrC6z+MwypmJk0i8+CZtkeIpwIXb7dASWDz86qGp6MT3G FJvG3eA5rF2AYahvF/mv6FgxBmKfg8+qVxthXvdCfEHFxx+PEvmgH6PG1LOUmNnsNDdO K3R/oh7eckba8nnLxO1cRHHHxzX5U1T3lUJxurEp87Vs/UMKzL1VIFFIbUCgxHxaLgMG iOzoi+A5aN8b69VblICG9RmWlASoQWhTFoK9BPj5zFfcKROqMe/EYFIdIeLZFMqN3ej7 krWP1MD9yZ3dT5ECXByCFKtdNm/m0W/pH0zCzRfbz5JS7Er8Dr1mygmBzN4dFGhMxxdo E2lg== 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; bh=IJPenuFpVQx0seln/2dhfFsuGNNRm+UZljRAm/AqGEU=; b=Dot88NvXM4dCi/jWeiGr2Gbq5ZIvU91yN1LvB8DnRR3xT459t7ZGN9FfprauaW1fQN Mr0GGnCuMeWBbZNZqKXZvVeRxkJeKNGHn6rx4hY/yO5GM1mZCD+xwLwR0fXOf+NYXS64 v/rNQY8DE8iTZ8z7HYX988MN1IuqfV6RHh2UE642kPrsWy069yyVTSfvbfdiz1YObAYq tNQO5UZYaIEvYL1O4wv11KlvCDGIadyqkjtevVuZpy4B62GUA5p4aL69IUQJqZIx/lZC 1LqFnvp1ckNjQk3VYghcdlubEzMdWnWc44MfVqkePw99smojv6hidCMwB6r6co1AhpVq e/MQ== X-Gm-Message-State: AOAM532j8sZ0U1P+OSJWgkMliCfDeql8fbcMNvllMb388iU//rBMawwI /xrAsPimqKy8rX/7cmOAHkw= X-Google-Smtp-Source: ABdhPJwRa2Z/m55HcVea1dDNvCKek/cSG6DIqGXdC4XhaAbVQRT83cYwoF0le9D7FEU0ikAN8oZ0TQ== X-Received: by 2002:a6b:39c3:: with SMTP id g186mr6519042ioa.91.1591327965688; Thu, 04 Jun 2020 20:32:45 -0700 (PDT) Received: from cs-u-kase.dtc.umn.edu (cs-u-kase.cs.umn.edu. [160.94.64.2]) by smtp.googlemail.com with ESMTPSA id c72sm2464004ilg.3.2020.06.04.20.32.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Jun 2020 20:32:45 -0700 (PDT) From: Navid Emamdoost To: Appana Durga Kedareswara rao , Naga Sureshkumar Relli , Wolfgang Grandegger , Marc Kleine-Budde , "David S. Miller" , Michal Simek , linux-can@vger.kernel.org, netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] can: xilinx_can: handle failure cases of pm_runtime_get_sync Date: Thu, 4 Jun 2020 22:32:39 -0500 Message-Id: <20200605033239.60664-1-navid.emamdoost@gmail.com> X-Mailer: git-send-email 2.17.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200604_203247_008016_E5D7EA3B X-CRM114-Status: GOOD ( 10.95 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Navid Emamdoost , emamd001@umn.edu, kjlu@umn.edu, wu000273@umn.edu, smccaman@umn.edu MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Calling pm_runtime_get_sync increments the counter even in case of failure, causing incorrect ref count. Call pm_runtime_put if pm_runtime_get_sync fails. Signed-off-by: Navid Emamdoost --- drivers/net/can/xilinx_can.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/net/can/xilinx_can.c b/drivers/net/can/xilinx_can.c index c1dbab8c896d..748ff70f6a7b 100644 --- a/drivers/net/can/xilinx_can.c +++ b/drivers/net/can/xilinx_can.c @@ -1391,7 +1391,7 @@ static int xcan_open(struct net_device *ndev) if (ret < 0) { netdev_err(ndev, "%s: pm_runtime_get failed(%d)\n", __func__, ret); - return ret; + goto err; } ret = request_irq(ndev->irq, xcan_interrupt, priv->irq_flags, @@ -1475,6 +1475,7 @@ static int xcan_get_berr_counter(const struct net_device *ndev, if (ret < 0) { netdev_err(ndev, "%s: pm_runtime_get failed(%d)\n", __func__, ret); + pm_runtime_put(priv->dev); return ret; } @@ -1789,7 +1790,7 @@ static int xcan_probe(struct platform_device *pdev) if (ret < 0) { netdev_err(ndev, "%s: pm_runtime_get failed(%d)\n", __func__, ret); - goto err_pmdisable; + goto err_disableclks; } if (priv->read_reg(priv, XCAN_SR_OFFSET) != XCAN_SR_CONFIG_MASK) { @@ -1824,7 +1825,6 @@ static int xcan_probe(struct platform_device *pdev) err_disableclks: pm_runtime_put(priv->dev); -err_pmdisable: pm_runtime_disable(&pdev->dev); err_free: free_candev(ndev); -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel