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From: Luis Chamberlain <mcgrof@kernel.org>
To: axboe@kernel.dk, colyli@suse.de, kent.overstreet@gmail.com,
	kbusch@kernel.org, sagi@grimberg.me, vishal.l.verma@intel.com,
	dan.j.williams@intel.com, dave.jiang@intel.com,
	ira.weiny@intel.com, konrad.wilk@oracle.com,
	roger.pau@citrix.com, boris.ostrovsky@oracle.com,
	jgross@suse.com, sstabellini@kernel.org, minchan@kernel.org,
	ngupta@vflare.org, senozhatsky@chromium.org
Cc: xen-devel@lists.xenproject.org, nvdimm@lists.linux.dev,
	linux-nvme@lists.infradead.org, linux-bcache@vger.kernel.org,
	linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
	Luis Chamberlain <mcgrof@kernel.org>
Subject: [PATCH v2 02/10] bcache: add error handling support for add_disk()
Date: Mon, 27 Sep 2021 15:00:31 -0700	[thread overview]
Message-ID: <20210927220039.1064193-3-mcgrof@kernel.org> (raw)
In-Reply-To: <20210927220039.1064193-1-mcgrof@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.

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 <colyli@suse.de>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
---
 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)
-- 
2.30.2


  parent reply	other threads:[~2021-09-27 22:00 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-27 22:00 [PATCH v2 00/10] block: second batch of add_disk() error handling conversions Luis Chamberlain
2021-09-27 22:00 ` [PATCH v2 01/10] block/brd: add error handling support for add_disk() Luis Chamberlain
2021-09-27 22:00 ` Luis Chamberlain [this message]
2021-09-27 22:00 ` [PATCH v2 03/10] nvme-multipath: " Luis Chamberlain
2021-09-27 22:13   ` Keith Busch
2021-09-28  5:39   ` Hannes Reinecke
2021-09-27 22:00 ` [PATCH v2 04/10] nvdimm/btt: do not call del_gendisk() if not needed Luis Chamberlain
2021-09-27 22:00 ` [PATCH v2 05/10] nvdimm/btt: use goto error labels on btt_blk_init() Luis Chamberlain
2021-09-27 22:00 ` [PATCH v2 06/10] nvdimm/btt: add error handling support for add_disk() Luis Chamberlain
2021-09-27 22:00 ` [PATCH v2 07/10] nvdimm/blk: avoid calling del_gendisk() on early failures Luis Chamberlain
2021-09-27 22:00 ` [PATCH v2 08/10] nvdimm/blk: add error handling support for add_disk() Luis Chamberlain
2021-09-27 22:00 ` [PATCH v2 09/10] xen-blkfront: " Luis Chamberlain
2021-09-30 13:07   ` Juergen Gross
2021-09-27 22:00 ` [PATCH v2 10/10] zram: " Luis Chamberlain
2021-09-27 22:33 ` [PATCH v2 00/10] block: second batch of add_disk() error handling conversions Jens Axboe

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