commit 5e65a20341e02df637d1c16cd487858d2c6a876a
author Josef Bacik <josef@toxicpanda.com> Thu Oct 11 15:29:30 2018 -0400
committer Jens Axboe <axboe@kernel.dk> Thu Oct 11 13:31:28 2018 -0600
tree 764df94ac438da2b84ee0482c57879ea50dde81c
parent 133424a207774d3d32a38d560c6469ed31c0472f

blk-wbt: wake up all when we scale up, not down

Tetsuo brought to my attention that I screwed up the scale_up/scale_down
helpers when I factored out the rq-qos code.  We need to wake up all the
waiters when we add slots for requests to make, not when we shrink the
slots.  Otherwise we'll end up things waiting forever.  This was a
mistake and simply puts everything back the way it was.

cc: stable@vger.kernel.org
Fixes: a79050434b45 ("blk-rq-qos: refactor out common elements of blk-wbt")
eported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>