From 2961c3bbcaec0ed7fb7b9a465b3796f37f2294e5 Mon Sep 17 00:00:00 2001 From: Luis Chamberlain Date: Fri, 15 Oct 2021 16:30:23 -0700 Subject: [PATCH] bcache: add error handling support for add_disk() 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 Link: https://lore.kernel.org/r/20211015233028.2167651-5-mcgrof@kernel.org Signed-off-by: Jens Axboe --- 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 dc35f6e1d8d3..84a48eed8e24 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -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) -- 2.11.0