From: Veerabhadrarao Badiganti vbadigan@codeaurora.org
[ Upstream commit e6bfb1bf00852b55f4c771f47ae67004c04d3c87 ]
In the request completion path with CQE, request type is being checked after the request is getting completed. This is resulting in returning the wrong request type and leading to the IO hang issue.
ASYNC request type is getting returned for DCMD type requests. Because of this mismatch, mq->cqe_busy flag is never getting cleared and the driver is not invoking blk_mq_hw_run_queue. So requests are not getting dispatched to the LLD from the block layer.
All these eventually leading to IO hang issues. So, get the request type before completing the request.
Cc: stable@vger.kernel.org Fixes: 1e8e55b67030 ("mmc: block: Add CQE support") Signed-off-by: Veerabhadrarao Badiganti vbadigan@codeaurora.org Acked-by: Adrian Hunter adrian.hunter@intel.com Link: https://lore.kernel.org/r/1588775643-18037-2-git-send-email-vbadigan@codeaur... Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/mmc/core/block.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index 60eac66dc9f0b..23bcdbba0cab9 100644 --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -1424,6 +1424,7 @@ static void mmc_blk_cqe_complete_rq(struct mmc_queue *mq, struct request *req) struct mmc_request *mrq = &mqrq->brq.mrq; struct request_queue *q = req->q; struct mmc_host *host = mq->card->host; + enum mmc_issue_type issue_type = mmc_issue_type(mq, req); unsigned long flags; bool put_card; int err; @@ -1453,7 +1454,7 @@ static void mmc_blk_cqe_complete_rq(struct mmc_queue *mq, struct request *req)
spin_lock_irqsave(q->queue_lock, flags);
- mq->in_flight[mmc_issue_type(mq, req)] -= 1; + mq->in_flight[issue_type] -= 1;
put_card = (mmc_tot_in_flight(mq) == 0);