From patchwork Thu May 20 09:22:13 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: 444116 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=-19.1 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, 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 B4F45C43460 for ; Thu, 20 May 2021 10:59:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 930BF61186 for ; Thu, 20 May 2021 10:59:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238846AbhETLBH (ORCPT ); Thu, 20 May 2021 07:01:07 -0400 Received: from mail.kernel.org ([198.145.29.99]:54416 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238971AbhETK5D (ORCPT ); Thu, 20 May 2021 06:57:03 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 26CC861CF3; Thu, 20 May 2021 10:02:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621504923; bh=YbVIz8Ibv02Yvf0tb5GKbY4pMdqT6P027w+wWsILNAE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Yc0zNIjbyByh2k8UdfbkLFMNf7OFEan7HsyR8yMMkamdXCQPInZIzZ14TlQg/jSVv G9B+eIzzJEvdqNuSU8oetT2fbMwnyaC2fcSqVdYnoYxxOBycFHLC/MFWc/sHP9CtgU MGC1/UOcpgPo7bqImXG4yesU9AWiT3eFGIq6/r8s= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jia Zhou , Yi Wang , Takashi Iwai , Sasha Levin Subject: [PATCH 4.9 141/240] ALSA: core: remove redundant spin_lock pair in snd_card_disconnect Date: Thu, 20 May 2021 11:22:13 +0200 Message-Id: <20210520092113.380345776@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520092108.587553970@linuxfoundation.org> References: <20210520092108.587553970@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jia Zhou [ Upstream commit abc21649b3e5c34b143bf86f0c78e33d5815e250 ] modification in commit 2a3f7221acdd ("ALSA: core: Fix card races between register and disconnect") resulting in this problem. Fixes: 2a3f7221acdd ("ALSA: core: Fix card races between register and disconnect") Signed-off-by: Jia Zhou Signed-off-by: Yi Wang Link: https://lore.kernel.org/r/1616989007-34429-1-git-send-email-wang.yi59@zte.com.cn Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin --- sound/core/init.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/sound/core/init.c b/sound/core/init.c index 02e96c580cb7..59377e579adb 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -406,10 +406,8 @@ int snd_card_disconnect(struct snd_card *card) return 0; } card->shutdown = 1; - spin_unlock(&card->files_lock); /* replace file->f_op with special dummy operations */ - spin_lock(&card->files_lock); list_for_each_entry(mfile, &card->files_list, list) { /* it's critical part, use endless loop */ /* we have no room to fail */