| commit | 3c782d67c16889d753a79a8da5422c583d7cfd51 | [log] [tgz] |
|---|---|---|
| author | Jens Axboe <axboe@fb.com> | Thu Jan 26 12:50:36 2017 -0700 |
| committer | Jens Axboe <axboe@fb.com> | Fri Jan 27 08:20:31 2017 -0700 |
| tree | a34fce71ed855738dd53b3e66594446a23df7319 | |
| parent | 0abad774124351ba211b9053786ebd5a5a722d53 [diff] |
blk-mq: fix potential race in queue restart and driver tag allocation Once we mark the queue as needing a restart, re-check if we can get a driver tag. This fixes a theoretical issue where the needed IO completes _after_ blk_mq_get_driver_tag() fails, but before we manage to set the restart bit. Signed-off-by: Jens Axboe <axboe@fb.com> Reviewed-by: Omar Sandoval <osandov@fb.com> Tested-by: Hannes Reinecke <hare@suse.com>