diff options
| author | Keith Busch <keith.busch@intel.com> | 2015-01-07 18:55:44 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-01-08 08:55:40 -0700 |
| commit | c68ed59f534c318716c6189050af3c5ea03b8071 (patch) | |
| tree | 6c37d638773c80c2f45b9ecb88d9e2ca60c210ba /block | |
| parent | 973c01919bce7e3559b62a856b29211ec5ac325c (diff) | |
| download | lwn-c68ed59f534c318716c6189050af3c5ea03b8071.tar.gz lwn-c68ed59f534c318716c6189050af3c5ea03b8071.zip | |
blk-mq: Let drivers cancel requeue_work
Kicking requeued requests will start h/w queues in a work_queue, which
may alter the driver's requested state to temporarily stop them. This
patch exports a method to cancel the q->requeue_work so a driver can be
assured stopped h/w queues won't be started up before it is ready.
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-mq.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index ce4811667d36..e73a5dd89fc4 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -527,6 +527,12 @@ void blk_mq_add_to_requeue_list(struct request *rq, bool at_head) } EXPORT_SYMBOL(blk_mq_add_to_requeue_list); +void blk_mq_cancel_requeue_work(struct request_queue *q) +{ + cancel_work_sync(&q->requeue_work); +} +EXPORT_SYMBOL_GPL(blk_mq_cancel_requeue_work); + void blk_mq_kick_requeue_list(struct request_queue *q) { kblockd_schedule_work(&q->requeue_work); |