3.16.51-rc1 review patch. If anyone has any objections, please let me know.
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From: Jan Kara jack@suse.cz
commit 4b758df21ee7081ab41448d21d60367efaa625b3 upstream.
If blkdev_get_by_path() in register_bcache() fails, we try to lookup the block device using lookup_bdev() to detect which situation we are in to properly report error. However we never drop the reference returned to us from lookup_bdev(). Fix that.
Signed-off-by: Jan Kara jack@suse.cz Acked-by: Coly Li colyli@suse.de Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Ben Hutchings ben@decadent.org.uk --- drivers/md/bcache/super.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -1974,6 +1974,8 @@ static ssize_t register_bcache(struct ko else err = "device busy"; mutex_unlock(&bch_register_lock); + if (!IS_ERR(bdev)) + bdput(bdev); if (attr == &ksysfs_register_quiet) goto out; }