diff options
| author | Yufen Yu <yuyufen@huawei.com> | 2019-03-18 15:44:41 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-03-20 21:02:07 +0100 |
| commit | 29ece8b4354f8c5eaee798a3d8a1b356efee426f (patch) | |
| tree | 953360a0c9964a71527205e3f427269c80d0f10f /block/blk-mq.c | |
| parent | blk-mq: remove unused 'nr_expired' from blk_mq_hw_ctx (diff) | |
| download | linux-29ece8b4354f8c5eaee798a3d8a1b356efee426f.tar.xz linux-29ece8b4354f8c5eaee798a3d8a1b356efee426f.zip | |
block: add BLK_MQ_POLL_CLASSIC for hybrid poll and return EINVAL for unexpected value
For q->poll_nsec == -1, means doing classic poll, not hybrid poll.
We introduce a new flag BLK_MQ_POLL_CLASSIC to replace -1, which
may make code much easier to read.
Additionally, since val is an int obtained with kstrtoint(), val can be
a negative value other than -1, so return -EINVAL for that case.
Thanks to Damien Le Moal for some good suggestion.
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Yufen Yu <yuyufen@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq.c')
| -rw-r--r-- | block/blk-mq.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index ea01c23b58a3..76a3f78c566a 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2856,7 +2856,7 @@ struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set, /* * Default to classic polling */ - q->poll_nsec = -1; + q->poll_nsec = BLK_MQ_POLL_CLASSIC; blk_mq_init_cpu_queues(q, set->nr_hw_queues); blk_mq_add_queue_tag_set(set, q); @@ -3391,7 +3391,7 @@ static bool blk_mq_poll_hybrid(struct request_queue *q, { struct request *rq; - if (q->poll_nsec == -1) + if (q->poll_nsec == BLK_MQ_POLL_CLASSIC) return false; if (!blk_qc_t_is_internal(cookie)) |