From patchwork Mon Dec 28 12:48:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 352994 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 7F5C6C432C3 for ; Mon, 28 Dec 2020 16:37:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4BFAA22B2B for ; Mon, 28 Dec 2020 16:37:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729841AbgL1NBo (ORCPT ); Mon, 28 Dec 2020 08:01:44 -0500 Received: from mail.kernel.org ([198.145.29.99]:58016 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729837AbgL1NBm (ORCPT ); Mon, 28 Dec 2020 08:01:42 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 828B9208BA; Mon, 28 Dec 2020 13:01:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1609160462; bh=pgLXocH2vJ9te5HZy5zwbwL6P1bRMwPOKZSh4VVgUUI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qBm0M87YcKtMqtQ9cH2L+6hHSMx874BGgihGKRup98JTcI9HQ3siA38OgFP02lNtP fBij6a1w91h4gY+TQ9mqvs7ZsiQ4jYjLYApcqybZdLLp6sZ3N4PhkzqH2jV+MFr6Jn c3qcIWcO32W5corSGyloaR/YIQwUkoRb50SC7QxU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Zhang Qilong , Kurt Van Dijck , Marc Kleine-Budde , Jakub Kicinski , Sasha Levin Subject: [PATCH 4.9 029/175] can: softing: softing_netdev_open(): fix error handling Date: Mon, 28 Dec 2020 13:48:02 +0100 Message-Id: <20201228124854.670268352@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201228124853.216621466@linuxfoundation.org> References: <20201228124853.216621466@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Zhang Qilong [ Upstream commit 4d1be581ec6b92a338bb7ed23e1381f45ddf336f ] If softing_netdev_open() fails, we should call close_candev() to avoid reference leak. Fixes: 03fd3cf5a179d ("can: add driver for Softing card") Signed-off-by: Zhang Qilong Acked-by: Kurt Van Dijck Link: https://lore.kernel.org/r/20201202151632.1343786-1-zhangqilong3@huawei.com Signed-off-by: Marc Kleine-Budde Link: https://lore.kernel.org/r/20201204133508.742120-2-mkl@pengutronix.de Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/can/softing/softing_main.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/net/can/softing/softing_main.c b/drivers/net/can/softing/softing_main.c index 7621f91a8a209..fd48770ba7920 100644 --- a/drivers/net/can/softing/softing_main.c +++ b/drivers/net/can/softing/softing_main.c @@ -393,8 +393,13 @@ static int softing_netdev_open(struct net_device *ndev) /* check or determine and set bittime */ ret = open_candev(ndev); - if (!ret) - ret = softing_startstop(ndev, 1); + if (ret) + return ret; + + ret = softing_startstop(ndev, 1); + if (ret < 0) + close_candev(ndev); + return ret; }