[PATCH] blk-mq-sched: don't run the queue async from blk_mq_try_issue_directly()

[Jens Axboe]

If we have scheduling enabled, we jump directly to insert-and-run.
That's fine, but we run the queue async and we don't pass in information
on whether we can block from this context or not. Fixup both these
cases.

Signed-off-by: Jens Axboe <ax...@fb.com>

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 159187a28d66..4196d6bee92d 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1434,7 +1434,8 @@ static blk_qc_t request_to_qc_t(struct blk_mq_hw_ctx 
*hctx, struct request *rq)
        return blk_tag_to_qc_t(rq->internal_tag, hctx->queue_num, true);
 }
 
-static void blk_mq_try_issue_directly(struct request *rq, blk_qc_t *cookie)
+static void blk_mq_try_issue_directly(struct request *rq, blk_qc_t *cookie,
+                                     bool can_block)
 {
        struct request_queue *q = rq->q;
        struct blk_mq_queue_data bd = {
@@ -1475,7 +1476,7 @@ static void blk_mq_try_issue_directly(struct request *rq, 
blk_qc_t *cookie)
        }
 
 insert:
-       blk_mq_sched_insert_request(rq, false, true, true, false);
+       blk_mq_sched_insert_request(rq, false, true, false, can_block);
 }
 
 /*
@@ -1569,11 +1570,11 @@ static blk_qc_t blk_mq_make_request(struct 
request_queue *q, struct bio *bio)
 
                if (!(data.hctx->flags & BLK_MQ_F_BLOCKING)) {
                        rcu_read_lock();
-                       blk_mq_try_issue_directly(old_rq, &cookie);
+                       blk_mq_try_issue_directly(old_rq, &cookie, false);
                        rcu_read_unlock();
                } else {
                        srcu_idx = srcu_read_lock(&data.hctx->queue_rq_srcu);
-                       blk_mq_try_issue_directly(old_rq, &cookie);
+                       blk_mq_try_issue_directly(old_rq, &cookie, true);
                        srcu_read_unlock(&data.hctx->queue_rq_srcu, srcu_idx);
                }
                goto done;

-- 
Jens Axboe