From patchwork Fri Aug 27 19:05:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luis Chamberlain X-Patchwork-Id: 12462731 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=-17.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, 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 AF0E6C43216 for ; Fri, 27 Aug 2021 19:05:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9224260F25 for ; Fri, 27 Aug 2021 19:05:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231192AbhH0TG0 (ORCPT ); Fri, 27 Aug 2021 15:06:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56518 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230429AbhH0TGX (ORCPT ); Fri, 27 Aug 2021 15:06:23 -0400 Received: from bombadil.infradead.org (unknown [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 123AEC061796; Fri, 27 Aug 2021 12:05:34 -0700 (PDT) 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=5zQ5zmFlRLt8Vc/PBo5Ci+3uvu0k1+9yu+E5gjjsKZw=; b=btHP3MX2IbvBzhBm2GOVDzBh8x Z4oOq6Lnc4q9cz14k/vYx35ffeQpqPcWhUZckBuf8BgKZ2w+YhLZsB4+UeoMRvCVLmIwGOvsxM0V3 1thFHxvYG5Eq9Uqr20+toHyWwJB0+wB4picKhosR6mzE3o7PoEoVC9hjDaYr6d9HsUXVR6bb/6XEm TT+J5cy5F3LczsmEN73PjJkxa9oIVczN9e8mPjCYkXuabRNwwWS3RtsVv3pFw1eqJA8ZN4Qta+AD1 nhzrWIiNn9EJjM+dw5mN7Idxpeac9h2iVwsnAgA3tdRN7gzoAy0J6qQXZHefYiH2Hg5hKDI9LryA4 8ktHQyBg==; Received: from mcgrof by bombadil.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1mJhA1-00D1L7-DY; Fri, 27 Aug 2021 19:05:05 +0000 From: Luis Chamberlain To: axboe@kernel.dk, martin.petersen@oracle.com, jejb@linux.ibm.com, kbusch@kernel.org, sagi@grimberg.me, adrian.hunter@intel.com, beanhuo@micron.com, ulf.hansson@linaro.org, avri.altman@wdc.com, swboyd@chromium.org, agk@redhat.com, snitzer@redhat.com, josef@toxicpanda.com Cc: hch@infradead.org, hare@suse.de, bvanassche@acm.org, ming.lei@redhat.com, linux-scsi@vger.kernel.org, linux-nvme@lists.infradead.org, linux-mmc@vger.kernel.org, dm-devel@redhat.com, nbd@other.debian.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, Luis Chamberlain , Christoph Hellwig Subject: [PATCH v2 4/6] md: add error handling support for add_disk() Date: Fri, 27 Aug 2021 12:05:02 -0700 Message-Id: <20210827190504.3103362-5-mcgrof@kernel.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210827190504.3103362-1-mcgrof@kernel.org> References: <20210827190504.3103362-1-mcgrof@kernel.org> MIME-Version: 1.0 Sender: Luis Chamberlain Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org We never checked for errors on add_disk() as this function returned void. Now that this is fixed, use the shiny new error handling. We just do the unwinding of what was not done before, and are sure to unlock prior to bailing. Reviewed-by: Christoph Hellwig Signed-off-by: Luis Chamberlain --- drivers/md/md.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/md/md.c b/drivers/md/md.c index ae8fe54ea358..5c0d3536d7c7 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -5704,7 +5704,11 @@ static int md_alloc(dev_t dev, char *name) * through to md_open, so make sure it doesn't get too far */ mutex_lock(&mddev->open_mutex); - add_disk(disk); + error = add_disk(disk); + if (error) { + blk_cleanup_disk(disk); + goto abort_unlock; + } error = kobject_add(&mddev->kobj, &disk_to_dev(disk)->kobj, "%s", "md"); if (error) { @@ -5718,6 +5722,7 @@ static int md_alloc(dev_t dev, char *name) if (mddev->kobj.sd && sysfs_create_group(&mddev->kobj, &md_bitmap_group)) pr_debug("pointless warning\n"); + abort_unlock: mutex_unlock(&mddev->open_mutex); abort: mutex_unlock(&disks_mutex);