From patchwork Mon Aug 23 20:29:27 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luis Chamberlain X-Patchwork-Id: 502046 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=ham 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 69943C4338F for ; Mon, 23 Aug 2021 20:30:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5643D60E97 for ; Mon, 23 Aug 2021 20:30:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232921AbhHWUbQ (ORCPT ); Mon, 23 Aug 2021 16:31:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57422 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232568AbhHWUa7 (ORCPT ); Mon, 23 Aug 2021 16:30:59 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1C22DC06175F; Mon, 23 Aug 2021 13:30:16 -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=OfWwvKvXHF7mAR0YH9EVQI1Ai4xHJmlcz1fm4t+WkvQ=; b=c1NoizZM+bXC/4X0Kr/yu9qM/4 vogWc0nrHBCi45AdGqOBAij28BuUscFaMAFHbJ2yXQCp5OH9DacSlocg057cgyhEzAbp+eqUj9Zfh 6gWNmHJ2C2e/7/pq/RB+53totPFBi3AUR0PxzJLMVHEgo7uT0Z7UvGZdbbilsChDr2RBszTvYlsOb PELdLD+eJ6LkLyE4ocLD45dCwrtv3J3wf3TA8HC95Ydw3sT4gdo5pNlkSoYEw8a45/pSmg3NFnBWI GWZR46Bma5vyjALSf1nrc1KO1TqKtNpD5kmRJlERTgeNeRb6CWNyzFxwURUSlXc8oNnuujcl9QiQD if8hBZZA==; Received: from mcgrof by bombadil.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1mIGZa-000ZjW-BM; Mon, 23 Aug 2021 20:29:34 +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 Subject: [PATCH 07/10] md: add error handling support for add_disk() Date: Mon, 23 Aug 2021 13:29:27 -0700 Message-Id: <20210823202930.137278-8-mcgrof@kernel.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210823202930.137278-1-mcgrof@kernel.org> References: <20210823202930.137278-1-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. 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);