Commit 3c94d83c authored by Jens Axboe's avatar Jens Axboe

blk-mq: change blk_mq_queue_busy() to blk_mq_queue_inflight()

There's a single user of this function, dm, and dm just wants
to check if IO is inflight, not that it's just allocated.

This fixes a hang with srp/002 in blktests with dm, where it tries
to suspend but waits for inflight IO to finish first. As it checks
for just allocated requests, this fails.
Tested-by: default avatarMike Snitzer <snitzer@redhat.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent e5edd5f2
......@@ -805,14 +805,14 @@ struct request *blk_mq_tag_to_rq(struct blk_mq_tags *tags, unsigned int tag)
}
EXPORT_SYMBOL(blk_mq_tag_to_rq);
static bool blk_mq_check_busy(struct blk_mq_hw_ctx *hctx, struct request *rq,
static bool blk_mq_rq_inflight(struct blk_mq_hw_ctx *hctx, struct request *rq,
void *priv, bool reserved)
{
/*
* If we find a request, we know the queue is busy. Return false
* to stop the iteration.
* If we find a request that is inflight and the queue matches,
* we know the queue is busy. Return false to stop the iteration.
*/
if (rq->q == hctx->queue) {
if (rq->state == MQ_RQ_IN_FLIGHT && rq->q == hctx->queue) {
bool *busy = priv;
*busy = true;
......@@ -822,14 +822,14 @@ static bool blk_mq_check_busy(struct blk_mq_hw_ctx *hctx, struct request *rq,
return true;
}
bool blk_mq_queue_busy(struct request_queue *q)
bool blk_mq_queue_inflight(struct request_queue *q)
{
bool busy = false;
blk_mq_queue_tag_busy_iter(q, blk_mq_check_busy, &busy);
blk_mq_queue_tag_busy_iter(q, blk_mq_rq_inflight, &busy);
return busy;
}
EXPORT_SYMBOL_GPL(blk_mq_queue_busy);
EXPORT_SYMBOL_GPL(blk_mq_queue_inflight);
static void blk_mq_rq_timed_out(struct request *req, bool reserved)
{
......
......@@ -663,7 +663,7 @@ static bool md_in_flight_bios(struct mapped_device *md)
static bool md_in_flight(struct mapped_device *md)
{
if (queue_is_mq(md->queue))
return blk_mq_queue_busy(md->queue);
return blk_mq_queue_inflight(md->queue);
else
return md_in_flight_bios(md);
}
......
......@@ -257,7 +257,7 @@ void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule);
void blk_mq_free_request(struct request *rq);
bool blk_mq_can_queue(struct blk_mq_hw_ctx *);
bool blk_mq_queue_busy(struct request_queue *q);
bool blk_mq_queue_inflight(struct request_queue *q);
enum {
/* return when out of requests */
......
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