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=-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,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 76AECC6379F for ; Tue, 17 Nov 2020 13:32:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 349D221734 for ; Tue, 17 Nov 2020 13:32:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="SXGFSd5k" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732299AbgKQNcb (ORCPT ); Tue, 17 Nov 2020 08:32:31 -0500 Received: from mail.kernel.org ([198.145.29.99]:41756 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732249AbgKQNcM (ORCPT ); Tue, 17 Nov 2020 08:32:12 -0500 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (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 9E16224686; Tue, 17 Nov 2020 13:32:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1605619932; bh=hpCBLHQBHyPjrGn+etD6zv0AQoAbnkgDD4Y9WB9IEGI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SXGFSd5kZtIc9w2bYy9rTIms7eFpDPiASzTuJWIVNzOqgFKiGwZosu0gGyS9OQUeQ JTD8am3bRX7HkQ0h4GtGKQe3Xgn5GB3gkDHweV/QqcjtDmqLJdYHarGyEHfbCxxFQU e13lzODpdpGd4beBiGVipzk3VOGTV8K6gktihYVY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Navid Emamdoost , Marc Kleine-Budde , Sasha Levin Subject: [PATCH 5.9 052/255] can: xilinx_can: handle failure cases of pm_runtime_get_sync Date: Tue, 17 Nov 2020 14:03:12 +0100 Message-Id: <20201117122141.484722815@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201117122138.925150709@linuxfoundation.org> References: <20201117122138.925150709@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Navid Emamdoost [ Upstream commit 79c43333bdd5a7026a5aab606b53053b643585e7 ] 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 Link: https://lore.kernel.org/r/20200605033239.60664-1-navid.emamdoost@gmail.com Fixes: 4716620d1b62 ("can: xilinx: Convert to runtime_pm") Signed-off-by: Marc Kleine-Budde Signed-off-by: Sasha Levin --- 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 c1dbab8c896d5..748ff70f6a7bf 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); -- 2.27.0