Re: [PATCH 01/19] bcache: Fix leak of bdev reference

On Fri, Jun 30, 2017 at 01:42:50PM -0700, bcache@lists.ewheeler.net wrote:

From: Jan Kara <jack@suse.cz>

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.

This look ok, but I think that whole chunk of code should just go
away - adding a lookup_bdev and resulting mess just for a slightly
different error message is just insane.