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Diffstat (limited to 'block/blk-mq.c')
-rw-r--r--block/blk-mq.c27
1 files changed, 4 insertions, 23 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 5ee62b95f3e5..c96c8c4f751b 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1931,7 +1931,8 @@ out:
/* If we didn't flush the entire list, we could have told the driver
* there was more coming, but that turned out to be a lie.
*/
- if ((!list_empty(list) || errors) && q->mq_ops->commit_rqs && queued)
+ if ((!list_empty(list) || errors || needs_resource ||
+ ret == BLK_STS_DEV_RESOURCE) && q->mq_ops->commit_rqs && queued)
q->mq_ops->commit_rqs(hctx);
/*
* Any items that need requeuing? Stuff them into hctx->dispatch,
@@ -2229,26 +2230,6 @@ void blk_mq_delay_run_hw_queues(struct request_queue *q, unsigned long msecs)
}
EXPORT_SYMBOL(blk_mq_delay_run_hw_queues);
-/**
- * blk_mq_queue_stopped() - check whether one or more hctxs have been stopped
- * @q: request queue.
- *
- * The caller is responsible for serializing this function against
- * blk_mq_{start,stop}_hw_queue().
- */
-bool blk_mq_queue_stopped(struct request_queue *q)
-{
- struct blk_mq_hw_ctx *hctx;
- unsigned long i;
-
- queue_for_each_hw_ctx(q, hctx, i)
- if (blk_mq_hctx_stopped(hctx))
- return true;
-
- return false;
-}
-EXPORT_SYMBOL(blk_mq_queue_stopped);
-
/*
* This function is often used for pausing .queue_rq() by driver when
* there isn't enough resource or some conditions aren't satisfied, and
@@ -2570,7 +2551,7 @@ static void blk_mq_plug_issue_direct(struct blk_plug *plug, bool from_schedule)
break;
case BLK_STS_RESOURCE:
case BLK_STS_DEV_RESOURCE:
- blk_mq_request_bypass_insert(rq, false, last);
+ blk_mq_request_bypass_insert(rq, false, true);
blk_mq_commit_rqs(hctx, &queued, from_schedule);
return;
default:
@@ -2680,6 +2661,7 @@ void blk_mq_try_issue_list_directly(struct blk_mq_hw_ctx *hctx,
list_del_init(&rq->queuelist);
ret = blk_mq_request_issue_directly(rq, list_empty(list));
if (ret != BLK_STS_OK) {
+ errors++;
if (ret == BLK_STS_RESOURCE ||
ret == BLK_STS_DEV_RESOURCE) {
blk_mq_request_bypass_insert(rq, false,
@@ -2687,7 +2669,6 @@ void blk_mq_try_issue_list_directly(struct blk_mq_hw_ctx *hctx,
break;
}
blk_mq_end_request(rq, ret);
- errors++;
} else
queued++;
}