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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 0B011C47257 for ; Mon, 4 May 2020 18:07:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D6C972073B for ; Mon, 4 May 2020 18:07:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588615671; bh=5Hg05jQx9fKm4esxgnrhIs8kDmBvvcdpoQ+ZqfQAQVs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=rAkdGPpo0o+SPSG1fVbJQhK6gTQ3mZongUTYwf0aC1xDDZlzx2tmKvz9Yd/mvB7h/ Ra0iRTEwZhFkLrHRSFsO1xDcSZfc2diodpz/dR/rNrmBrk2h1CH4l5TQ0Jn6UbtMIQ 7Ham+bsSqpXoCC3BIo9zeNpzn7uEr8/9RjFEH234= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732201AbgEDSHv (ORCPT ); Mon, 4 May 2020 14:07:51 -0400 Received: from mail.kernel.org ([198.145.29.99]:38846 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732192AbgEDSHt (ORCPT ); Mon, 4 May 2020 14:07:49 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 63C3A20721; Mon, 4 May 2020 18:07:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588615668; bh=5Hg05jQx9fKm4esxgnrhIs8kDmBvvcdpoQ+ZqfQAQVs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CSmmExwGUz9Dm8TBiDGJBKr0K5uTRc8axRDLqAYmYhUe1GHKJeEBfg2MTTrd7J+nx x3iP1eBCumZlT5hTGiappfxrVyFfYlTov3zPdlbDfAnXB3SR+9X4aVt4vAE064Dym9 QAM2SpBzRVVOn993nBH4XqW3I9DqQ6bDUi32r4qI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?UTF-8?q?Michal=20Koutn=C3=BD?= , Yang Xu , Christoph Hellwig , Jens Axboe Subject: [PATCH 5.6 40/73] block: remove the bd_openers checks in blk_drop_partitions Date: Mon, 4 May 2020 19:57:43 +0200 Message-Id: <20200504165508.013010361@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200504165501.781878940@linuxfoundation.org> References: <20200504165501.781878940@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Christoph Hellwig commit 10c70d95c0f2f9a6f52d0e33243d2877370cef51 upstream. When replacing the bd_super check with a bd_openers I followed a logical conclusion, which turns out to be utterly wrong. When a block device has bd_super sets it has a mount file system on it (although not every mounted file system sets bd_super), but that also implies it doesn't even have partitions to start with. So instead of trying to come up with a logical check for all openers, just remove the check entirely. Fixes: d3ef5536274f ("block: fix busy device checking in blk_drop_partitions") Fixes: cb6b771b05c3 ("block: fix busy device checking in blk_drop_partitions again") Reported-by: Michal Koutný Reported-by: Yang Xu Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- block/partition-generic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/block/partition-generic.c +++ b/block/partition-generic.c @@ -468,7 +468,7 @@ int blk_drop_partitions(struct gendisk * if (!disk_part_scan_enabled(disk)) return 0; - if (bdev->bd_part_count || bdev->bd_openers > 1) + if (bdev->bd_part_count) return -EBUSY; res = invalidate_partition(disk, 0); if (res)