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authorBart Van Assche <bart.vanassche@sandisk.com>2017-06-20 11:15:43 -0700
committerJens Axboe <axboe@kernel.dk>2017-06-20 19:27:14 -0600
commitc3a148d20affcc334348402865169a61000d3905 (patch)
tree62212e8c99043deb1ab66785211ddb87408fab2d
parentc8d9cf22cf0f89d1249a57ade5a1949c62075ce6 (diff)
blk-mq: Initialize .rq_flags in blk_mq_rq_ctx_init()
Initialization of blk-mq requests is a bit weird: blk_mq_rq_ctx_init() is called after a value has been assigned to .rq_flags and .rq_flags is initialized in __blk_mq_finish_request(). Initialize .rq_flags in blk_mq_rq_ctx_init() instead of relying on __blk_mq_finish_request(). Moving the initialization of .rq_flags is fine because all changes and tests of .rq_flags occur between blk_get_request() and finishing a request. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.com> Cc: Omar Sandoval <osandov@fb.com> Cc: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
-rw-r--r--block/blk-mq.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 2d21fbccc3a5..6268380c680f 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -228,6 +228,8 @@ 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];
+ rq->rq_flags = 0;
+
if (data->flags & BLK_MQ_REQ_INTERNAL) {
rq->tag = -1;
rq->internal_tag = tag;
@@ -423,7 +425,6 @@ void blk_mq_free_request(struct request *rq)
atomic_dec(&hctx->nr_active);
wbt_done(q->rq_wb, &rq->issue_stat);
- rq->rq_flags = 0;
clear_bit(REQ_ATOM_STARTED, &rq->atomic_flags);
clear_bit(REQ_ATOM_POLL_SLEPT, &rq->atomic_flags);