From patchwork Fri Oct 15 23:30:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luis Chamberlain X-Patchwork-Id: 12562999 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F05CCC433EF for ; Fri, 15 Oct 2021 23:31:28 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C3C0161151 for ; Fri, 15 Oct 2021 23:31:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org C3C0161151 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.211134.368284 (Exim 4.92) (envelope-from ) id 1mbWfW-00027N-Qd; Fri, 15 Oct 2021 23:31:18 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 211134.368284; Fri, 15 Oct 2021 23:31:18 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1mbWfW-00027B-Kh; Fri, 15 Oct 2021 23:31:18 +0000 Received: by outflank-mailman (input) for mailman id 211134; Fri, 15 Oct 2021 23:31:17 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1mbWfV-0000i4-3v for xen-devel@lists.xenproject.org; Fri, 15 Oct 2021 23:31:17 +0000 Received: from bombadil.infradead.org (unknown [2607:7c80:54:e::133]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id ec0fe7fb-3101-4ea6-8b6e-55e8114f01cc; Fri, 15 Oct 2021 23:30:57 +0000 (UTC) Received: from mcgrof by bombadil.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1mbWej-0095ux-8E; Fri, 15 Oct 2021 23:30:29 +0000 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list X-Inumbo-ID: ec0fe7fb-3101-4ea6-8b6e-55e8114f01cc DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Sender:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description; bh=o1//ec0r5e8VTnwYNp5R5eQwtP7WISCGubCypYTw4Jw=; b=LW2F7o9AfnmLff+UOqZtBvoesh ZDxjZh8yGJTFjoCXtG72Qf6wiK50Ivqs2nLYTyK0D4PE3RqGQeM7NHkQc1HgaiuC389ySfZ9y6tbY VRe+cl9qKO5Q6YIJqZ7sL3W1y4lRXKxWamL98pgo7JKgSyLRT/JDscfv355hCy4dMGDT46XBVp+Nm wVo9xMhmi3IrJFUR2gl64sdIHlMJnpD1Q59OFtrhwk/RMNq6/KnSG6DyCHHu7BJ6DTes7dtF/Fbid VAD77+Ygj0Xd4lLc0+I1bb/qHRVoHESD8eaekIlUicJJVR3pSkX9z1zbRu8FVAewt6xEX6yxhkckp FUXhxm9Q==; From: Luis Chamberlain To: axboe@kernel.dk, jejb@linux.ibm.com, martin.petersen@oracle.com, agk@redhat.com, snitzer@redhat.com, colyli@suse.de, kent.overstreet@gmail.com, boris.ostrovsky@oracle.com, jgross@suse.com, sstabellini@kernel.org, roger.pau@citrix.com, geert@linux-m68k.org, ulf.hansson@linaro.org, tj@kernel.org, hare@suse.de, jdike@addtoit.com, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes.berg@intel.com, krisman@collabora.com, chris.obbard@collabora.com, thehajime@gmail.com, zhuyifei1999@gmail.com, haris.iqbal@ionos.com, jinpu.wang@ionos.com, miquel.raynal@bootlin.com, vigneshr@ti.com, linux-mtd@lists.infradead.org Cc: linux-scsi@vger.kernel.org, dm-devel@redhat.com, linux-bcache@vger.kernel.org, xen-devel@lists.xenproject.org, linux-m68k@lists.linux-m68k.org, linux-um@lists.infradead.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, Luis Chamberlain Subject: [PATCH 3/9] dm: add add_disk() error handling Date: Fri, 15 Oct 2021 16:30:22 -0700 Message-Id: <20211015233028.2167651-4-mcgrof@kernel.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211015233028.2167651-1-mcgrof@kernel.org> References: <20211015233028.2167651-1-mcgrof@kernel.org> MIME-Version: 1.0 Sender: Luis Chamberlain We never checked for errors on add_disk() as this function returned void. Now that this is fixed, use the shiny new error handling. There are two calls to dm_setup_md_queue() which can fail then, one on dm_early_create() and we can easily see that the error path there calls dm_destroy in the error path. The other use case is on the ioctl table_load case. If that fails userspace needs to call the DM_DEV_REMOVE_CMD to cleanup the state - similar to any other failure. Reviewed-by: Hannes Reinecke Signed-off-by: Luis Chamberlain --- drivers/md/dm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 245fa4153306..6d3265ed37c0 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -2086,7 +2086,9 @@ int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t) if (r) return r; - add_disk(md->disk); + r = add_disk(md->disk); + if (r) + return r; r = dm_sysfs_init(md); if (r) {