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bcache: add error handling support for add_disk()

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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>
Link: https://lore.kernel.org/r/20211015233028.2167651-5-mcgrof@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Luis Chamberlain 2021-10-15 16:30:23 -07:00 committed by Jens Axboe
parent e7089f65dd
commit 2961c3bbca
1 changed files with 12 additions and 5 deletions
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17
drivers/md/bcache/super.c
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@ -1080,7 +1080,9 @@ 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
@ -1526,10 +1528,11 @@ 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);
@ -1543,9 +1546,12 @@ 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");
@ -1559,7 +1565,8 @@ 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)