io-wq: don't ask for a new worker if we're exiting

If we're in the process of shutting down the async context, then don't
create new workers if we already have at least the fixed one.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2021-02-26 09:52:02 -07:00
commit 613eeb600e