From patchwork Fri Aug 6 08:14:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 493351 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, 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 1746DC4338F for ; Fri, 6 Aug 2021 08:15:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F309B611C9 for ; Fri, 6 Aug 2021 08:15:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243728AbhHFIPr (ORCPT ); Fri, 6 Aug 2021 04:15:47 -0400 Received: from mail.kernel.org ([198.145.29.99]:44832 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243731AbhHFIPR (ORCPT ); Fri, 6 Aug 2021 04:15:17 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 98D17611C6; Fri, 6 Aug 2021 08:14:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1628237699; bh=oPvlV2NsK4f1ssaKBVn25F6huJX4K96v8zrnFjhoR1g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PDbpZr4uZHWzi482ob5BNwJezj2jvr0JA+yCE15kG8mz7ziEkpTYs4H+PbO2f1T6J AGSvu/G3rHfwxVSu3U9NhfqzJz+Gm080OcgMiXUTOJPvbgXsDwB1rS5ykDhdcAARHi RwiH069EAHTi137CZS6Mj/KKFMjyFkZ7p5NAHYTM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Takashi Iwai , "David S. Miller" , Sasha Levin Subject: [PATCH 4.4 3/6] r8152: Fix potential PM refcount imbalance Date: Fri, 6 Aug 2021 10:14:35 +0200 Message-Id: <20210806081109.047228695@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210806081108.939164003@linuxfoundation.org> References: <20210806081108.939164003@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Takashi Iwai [ Upstream commit 9c23aa51477a37f8b56c3c40192248db0663c196 ] rtl8152_close() takes the refcount via usb_autopm_get_interface() but it doesn't release when RTL8152_UNPLUG test hits. This may lead to the imbalance of PM refcount. This patch addresses it. Link: https://bugzilla.suse.com/show_bug.cgi?id=1186194 Signed-off-by: Takashi Iwai Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/usb/r8152.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c index 5baaa8291624..ebf6d4cf09ea 100644 --- a/drivers/net/usb/r8152.c +++ b/drivers/net/usb/r8152.c @@ -3159,9 +3159,10 @@ static int rtl8152_close(struct net_device *netdev) tp->rtl_ops.down(tp); mutex_unlock(&tp->control); + } + if (!res) usb_autopm_put_interface(tp->intf); - } free_all_mem(tp);