Received: by 2002:a05:6358:3188:b0:123:57c1:9b43 with SMTP id q8csp5320183rwd;
        Tue, 23 May 2023 23:15:34 -0700 (PDT)
X-Google-Smtp-Source: ACHHUZ6Ywrg1fckyL0bcRxky3lrP+tBs7yMu0QRT/LhGwiFc1fsf/RIMwZ7FZN+EcS0UbeBTzo9r
X-Received: by 2002:a05:6a20:3d8b:b0:103:7b36:f21 with SMTP id s11-20020a056a203d8b00b001037b360f21mr18819793pzi.21.1684908933699;
        Tue, 23 May 2023 23:15:33 -0700 (PDT)
ARC-Seal: i=1; a=rsa-sha256; t=1684908933; cv=none;
        d=google.com; s=arc-20160816;
        b=ANLYFEFmIeFD1PSakcg+4gNvHzPqqtM6JwfWRXtYrM69tT0jpDeNE5QD+gGMITgHFg
         dnskWyib37oiitP1KNHtdCVTRooZ0QyMuaF+ZpDotIB0Pz9MRydoT5hhTbU6DjKnIZjF
         zcm4TNDWSwMwZF5tAAvIr/LAAqxztGGKNRY1oL/XEPPUYfQMIlkdk6GwYYrCu7jlyaex
         bKJgL7fQaYWRGe5VbRxhjMuGbecX/tSA8J9dAVkclfXoIhBhLQwxmPQOvw2QDPFK/gZw
         eCKnltXXs4qTRMKawBDr8mi/o235nFaGMiMbP+9oldPr7L+bwHfHkrmWLlB66ev1K+/5
         S84A==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816;
        h=list-id:precedence:in-reply-to:content-disposition:mime-version
         :references:message-id:subject:cc:to:from:date:dkim-signature;
        bh=KnLSv0+fPc6PEE7Rpygl26X9mUYlOCDFN5hMIQruVy8=;
        b=pg1Thr+vWQoJSRHT33CuGiLv8y/2S//AGp3Bg6vS5NtRbgqS4PKZZmW8gVKsS4U51M
         fiz6UXslv/nEVomqDAFlnBeUWHkBryFsV0tDUJD0VFG6Al2gukufwQGvUw6BvNCecShW
         rxSKFbIT3nXBV7hPZ6zBKE/O6xoUpCq/v2s33XpTZ23dAMhN/6EP+mGOMve2JLRQWdAi
         TbzCbCi0F4IKJ49aa+vCjBMgvPS+cDa9eyccdJ7UuzVCmdpSX8YfLvocKd+cU017uvI1
         WWG7ZkgOFYrbo0jAA3cE5Ui1uhIylmYi2K+w3/hQsXupY4yWvcXMomu/vO2j4CRbfHLk
         t0iQ==
ARC-Authentication-Results: i=1; mx.google.com;
       dkim=pass header.i=@infradead.org header.s=bombadil.20210309 header.b=v45P3Sfe;
       spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20])
        by mx.google.com with ESMTP id f3-20020a637543000000b005346bc0f749si47769pgn.236.2023.05.23.23.15.19;
        Tue, 23 May 2023 23:15:33 -0700 (PDT)
Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Authentication-Results: mx.google.com;
       dkim=pass header.i=@infradead.org header.s=bombadil.20210309 header.b=v45P3Sfe;
       spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S239564AbjEXGE0 (ORCPT <rfc822;a839024@gmail.com> + 99 others);
        Wed, 24 May 2023 02:04:26 -0400
Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44306 "EHLO
        lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S239563AbjEXGEY (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Wed, 24 May 2023 02:04:24 -0400
Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133])
        by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BBC6E189
        for <linux-kernel@vger.kernel.org>; Tue, 23 May 2023 23:04:23 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;
        d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version
        :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To:
        Content-Transfer-Encoding:Content-ID:Content-Description;
        bh=KnLSv0+fPc6PEE7Rpygl26X9mUYlOCDFN5hMIQruVy8=; b=v45P3Sfe7pzlOmUUUO/XRUp/mE
        W1ojE0IGfhO5Wbvjf+mWwEH3jqb733iZJYieBdqjyMAe2kALKLvB6emXOHOggIcrV5N4yvteN653+
        CNenkySYftYeAJ2am2wdgqX1EdTFp2t1hXP11zK8PDpitVqXD9r4DxPlLWG/JqdKkMWtDtsWsU4vi
        3NYkP0nxEcwRKvjSgN/BlShTzSH5pif2/kskccf2muaJfSopXJWOagnwgxUOzWvKPodwhMIBX2Ca2
        /QAePD/3xIy7IuYjAb0sJ9udDOoknjhcIMokx/rg26UlyDJPqkcrwwKPHCxncW97wkoa7u7WywRpk
        koVXcnfw==;
Received: from hch by bombadil.infradead.org with local (Exim 4.96 #2 (Red Hat Linux))
        id 1q1hbe-00CSMD-0L;
        Wed, 24 May 2023 06:04:18 +0000
Date:   Tue, 23 May 2023 23:04:18 -0700
From:   Christoph Hellwig <hch@infradead.org>
To:     Vincent Whitchurch <vincent.whitchurch@axis.com>
Cc:     Richard Weinberger <richard@nod.at>,
        Miquel Raynal <miquel.raynal@bootlin.com>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org,
        kernel@axis.com
Subject: Re: [PATCH 2/2] ubi: block: Fix deadlock on remove
Message-ID: <ZG2o4rrfqWGbYziq@infradead.org>
References: <20230523-ubiblock-remove-v1-0-240bed75849b@axis.com>
 <20230523-ubiblock-remove-v1-2-240bed75849b@axis.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20230523-ubiblock-remove-v1-2-240bed75849b@axis.com>
X-SRS-Rewrite: SMTP reverse-path rewritten from <hch@infradead.org> by bombadil.infradead.org. See http://www.infradead.org/rpr.html
X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED,
        DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,
        SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no
        version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
        lindbergh.monkeyblade.net
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

If you imlement ->free_disk, the list_del and kfree can move into
that, and we don't really care if a new opener raced with the delete.