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| author | Jens Axboe <axboe@kernel.dk> | 2018-01-14 10:40:45 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-01-14 10:46:24 -0700 |
| commit | bf9ae8c5325c0070d0ec81a849bba8d156f65993 (patch) | |
| tree | 5fecfb6b1937bff7f721b9f8947cda6f64d25521 /block/blk-mq.c | |
| parent | 85ba3effc5a0836b9195f2010684062ad230cc23 (diff) | |
| download | lwn-bf9ae8c5325c0070d0ec81a849bba8d156f65993.tar.gz lwn-bf9ae8c5325c0070d0ec81a849bba8d156f65993.zip | |
blk-mq: fix bad clear of RQF_MQ_INFLIGHT in blk_mq_ct_ctx_init()
A previous commit moved the clearing of rq->rq_flags later,
but we may have already set RQF_MQ_INFLIGHT when that happens.
Ensure that we correctly initialize rq->rq_flags to the
right value.
This is based on an original fix by Ming, just rewritten to not
require a conditional.
Fixes: 7c3fb70f0341 ("block: rearrange a few request fields for better cache layout")
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq.c')
| -rw-r--r-- | block/blk-mq.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index b3b2003b7429..c8f62e6be6b6 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -269,13 +269,14 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data, { struct blk_mq_tags *tags = blk_mq_tags_from_data(data); struct request *rq = tags->static_rqs[tag]; + req_flags_t rq_flags = 0; if (data->flags & BLK_MQ_REQ_INTERNAL) { rq->tag = -1; rq->internal_tag = tag; } else { if (blk_mq_tag_busy(data->hctx)) { - rq->rq_flags = RQF_MQ_INFLIGHT; + rq_flags = RQF_MQ_INFLIGHT; atomic_inc(&data->hctx->nr_active); } rq->tag = tag; @@ -286,7 +287,7 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data, /* csd/requeue_work/fifo_time is initialized before use */ rq->q = data->q; rq->mq_ctx = data->ctx; - rq->rq_flags = 0; + rq->rq_flags = rq_flags; rq->cpu = -1; rq->cmd_flags = op; if (data->flags & BLK_MQ_REQ_PREEMPT) |