diff options
| author | Ming Lei <[email protected]> | 2021-11-11 08:51:33 +0000 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2021-11-11 18:52:33 +0000 |
| commit | 10f7335e3627b4efa341ef8ac457f2c0770c5c19 (patch) | |
| tree | 0f53e8e80279c25b7992bae4d94d93004fa15980 /drivers/fpga/fpga-mgr.c | |
| parent | block: fix kerneldoc for disk_register_independent_access__ranges() (diff) | |
| download | kernel-10f7335e3627b4efa341ef8ac457f2c0770c5c19.tar.gz kernel-10f7335e3627b4efa341ef8ac457f2c0770c5c19.zip | |
blk-mq: don't grab ->q_usage_counter in blk_mq_sched_bio_merge
blk_mq_sched_bio_merge is only called from blk-mq.c:blk_attempt_bio_merge(),
which is called when queue usage counter is grabbed already:
1) blk_mq_get_new_requests()
2) blk_mq_get_request()
- cached request in current plug owns one queue usage counter
So don't grab ->q_usage_counter in blk_mq_sched_bio_merge(), and more
importantly this nest way causes hang in blk_mq_freeze_queue_wait().
Cc: Christoph Hellwig <[email protected]>
Signed-off-by: Ming Lei <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>
Diffstat (limited to 'drivers/fpga/fpga-mgr.c')
0 files changed, 0 insertions, 0 deletions