From patchwork Fri Oct 15 23:30:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luis Chamberlain X-Patchwork-Id: 12563007 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 5941EC433F5 for ; Fri, 15 Oct 2021 23:31:46 +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 2376461151 for ; Fri, 15 Oct 2021 23:31:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 2376461151 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.211147.368328 (Exim 4.92) (envelope-from ) id 1mbWfq-0004KB-8O; Fri, 15 Oct 2021 23:31:38 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 211147.368328; Fri, 15 Oct 2021 23:31:38 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1mbWfq-0004Jl-45; Fri, 15 Oct 2021 23:31:38 +0000 Received: by outflank-mailman (input) for mailman id 211147; Fri, 15 Oct 2021 23:31:37 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1mbWfp-0000i4-4a for xen-devel@lists.xenproject.org; Fri, 15 Oct 2021 23:31:37 +0000 Received: from bombadil.infradead.org (unknown [2607:7c80:54:e::133]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 1469910f-8477-418a-950d-d21ea64b40cf; Fri, 15 Oct 2021 23:30:58 +0000 (UTC) Received: from mcgrof by bombadil.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1mbWej-0095uz-9F; 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: 1469910f-8477-418a-950d-d21ea64b40cf 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=hYL8LO+ietZVLiEWE2oEBW5mwRVdCiTP81FH5yaWaJI=; b=f+ADLXwubj85qcYLZJoMkaccF0 LA88l99fFG2x11Wj0W927MuLNzxH+aLXSi41Sta0kPK0c00mcuAfJRMhRo8O2/gVT8jFEkt0Zk4hr nRpIIyZaEygIxOu2Ir+1WF5xTs39HUTMf1P+eojMMuW0QLIF0wbil/OQxvEmzd64iDDxrFcmE+0yv kE8A86cACAhv+x1ja677g+NC4hNwoUKBXx1xqWEMK3YQiQVLgxdzr8G77MuSAupgfSMZX4TFT1Edb SbvQjQ/3HgQObpF99DOxhOoPdReW+f1FUge3qPoQJgqPVxOn1VIhcnU4ycnlt6M5auGj2buchrJJi DE0a5Yog==; 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 4/9] bcache: add error handling support for add_disk() Date: Fri, 15 Oct 2021 16:30:23 -0700 Message-Id: <20211015233028.2167651-5-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. This driver doesn't do any unwinding with blk_cleanup_disk() even on errors after add_disk() and so we follow that tradition. Acked-by: Coly Li Signed-off-by: Luis Chamberlain --- drivers/md/bcache/super.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index f2874c77ff79..f0c32cdd6594 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -1082,7 +1082,9 @@ int bch_cached_dev_run(struct cached_dev *dc) closure_sync(&cl); } - add_disk(d->disk); + ret = add_disk(d->disk); + if (ret) + goto out; bd_link_disk_holder(dc->bdev, dc->disk.disk); /* * won't show up in the uevent file, use udevadm monitor -e instead @@ -1534,10 +1536,11 @@ static void flash_dev_flush(struct closure *cl) static int flash_dev_run(struct cache_set *c, struct uuid_entry *u) { + int err = -ENOMEM; struct bcache_device *d = kzalloc(sizeof(struct bcache_device), GFP_KERNEL); if (!d) - return -ENOMEM; + goto err_ret; closure_init(&d->cl, NULL); set_closure_fn(&d->cl, flash_dev_flush, system_wq); @@ -1551,9 +1554,12 @@ static int flash_dev_run(struct cache_set *c, struct uuid_entry *u) bcache_device_attach(d, c, u - c->uuids); bch_sectors_dirty_init(d); bch_flash_dev_request_init(d); - add_disk(d->disk); + err = add_disk(d->disk); + if (err) + goto err; - if (kobject_add(&d->kobj, &disk_to_dev(d->disk)->kobj, "bcache")) + err = kobject_add(&d->kobj, &disk_to_dev(d->disk)->kobj, "bcache"); + if (err) goto err; bcache_device_link(d, c, "volume"); @@ -1567,7 +1573,8 @@ static int flash_dev_run(struct cache_set *c, struct uuid_entry *u) return 0; err: kobject_put(&d->kobj); - return -ENOMEM; +err_ret: + return err; } static int flash_devs_run(struct cache_set *c)