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=-18.8 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, 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 6BDD8C43616 for ; Fri, 9 Apr 2021 10:07:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 46DCD61182 for ; Fri, 9 Apr 2021 10:07:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234197AbhDIKHl (ORCPT ); Fri, 9 Apr 2021 06:07:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:43734 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233972AbhDIJ7q (ORCPT ); Fri, 9 Apr 2021 05:59:46 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 13E6361220; Fri, 9 Apr 2021 09:59:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1617962342; bh=hQ2YPpnywl18DyjEB+MqNY2SYWPtZfsDbhOlNF9U1+A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=i6n6Eyhwz//ydU7Xvio6JLod+iDb8dBIXYL1bi5kZytZarbs+3ennuvGTkVc9Wkhr hoI7QifwPp8gYSnA23xRkzscjBdYdOfFLDDtvrb31l8PkLB/SDzuWlNAk4rNHbTsrw dJ3qzA62va9R359n6o8LiknQoQTKN50uXm/9iLTw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Chris Chiu , Christoph Hellwig , Jens Axboe , Sasha Levin Subject: [PATCH 5.10 21/41] block: clear GD_NEED_PART_SCAN later in bdev_disk_changed Date: Fri, 9 Apr 2021 11:53:43 +0200 Message-Id: <20210409095305.512793634@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210409095304.818847860@linuxfoundation.org> References: <20210409095304.818847860@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: Chris Chiu [ Upstream commit 5116784039f0421e9a619023cfba3e302c3d9adc ] The GD_NEED_PART_SCAN is set by bdev_check_media_change to initiate a partition scan while removing a block device. It should be cleared after blk_drop_paritions because blk_drop_paritions could return -EBUSY and then the consequence __blkdev_get has no chance to do delete_partition if GD_NEED_PART_SCAN already cleared. It causes some problems on some card readers. Ex. Realtek card reader 0bda:0328 and 0bda:0158. The device node of the partition will not disappear after the memory card removed. Thus the user applications can not update the device mapping correctly. BugLink: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1920874 Signed-off-by: Chris Chiu Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/20210323085219.24428-1-chris.chiu@canonical.com Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- fs/block_dev.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/block_dev.c b/fs/block_dev.c index fe201b757baa..6516051807b8 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -1404,13 +1404,13 @@ int bdev_disk_changed(struct block_device *bdev, bool invalidate) lockdep_assert_held(&bdev->bd_mutex); - clear_bit(GD_NEED_PART_SCAN, &bdev->bd_disk->state); - rescan: ret = blk_drop_partitions(bdev); if (ret) return ret; + clear_bit(GD_NEED_PART_SCAN, &disk->state); + /* * Historically we only set the capacity to zero for devices that * support partitions (independ of actually having partitions created). -- 2.30.2