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| author | Jens Axboe <axboe@fb.com> | 2014-04-24 08:50:38 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-04-24 08:50:38 -0600 |
| commit | 70ab0b2d51f84fc7d9eb6ed81c3986595efaa33d (patch) | |
| tree | ed51da2f84f01b6b76f7c5a0163e1f18ffd12318 | |
| parent | 981bd189f80f34c07ac0d87e4760d09bcda5f4cb (diff) | |
| download | linux-70ab0b2d51f84fc7d9eb6ed81c3986595efaa33d.tar.bz2 | |
Revert "blk-mq: initialize req->q in allocation"
This reverts commit 6a3c8a3ac0e68dcfc2a01f4aa1ca0edd1a1701eb.
We need selective clearing of the request to make the init-at-free
time completely safe. Otherwise we end up stomping on
rq->atomic_flags, which we don't want to do.
| -rw-r--r-- | block/blk-mq.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index cea1bd87a416..7d5650d75aef 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -82,6 +82,7 @@ static struct request *__blk_mq_alloc_request(struct blk_mq_hw_ctx *hctx, tag = blk_mq_get_tag(hctx->tags, gfp, reserved); if (tag != BLK_MQ_TAG_FAIL) { rq = hctx->tags->rqs[tag]; + blk_rq_init(hctx->queue, rq); rq->tag = tag; return rq; @@ -186,7 +187,6 @@ static void blk_mq_rq_ctx_init(struct request_queue *q, struct blk_mq_ctx *ctx, if (blk_queue_io_stat(q)) rw_flags |= REQ_IO_STAT; - rq->q = q; rq->mq_ctx = ctx; rq->cmd_flags = rw_flags; rq->start_time = jiffies; @@ -258,7 +258,6 @@ static void __blk_mq_free_request(struct blk_mq_hw_ctx *hctx, const int tag = rq->tag; struct request_queue *q = rq->q; - blk_rq_init(hctx->queue, rq); blk_mq_put_tag(hctx->tags, tag); blk_mq_queue_exit(q); } @@ -1195,7 +1194,6 @@ static struct blk_mq_tags *blk_mq_init_rq_map(struct blk_mq_tag_set *set, left -= to_do * rq_size; for (j = 0; j < to_do; j++) { tags->rqs[i] = p; - blk_rq_init(NULL, tags->rqs[i]); if (set->ops->init_request) { if (set->ops->init_request(set->driver_data, tags->rqs[i], hctx_idx, i, |