diff mbox series

[PATCHv4,1/3] blk-mq: Return true if request was completed

Message ID 20181126165430.4519-2-keith.busch@intel.com (mailing list archive)
State Not Applicable
Headers show
Series scsi timeout handling updates | expand

Commit Message

Keith Busch Nov. 26, 2018, 4:54 p.m. UTC 
A driver may have internal state to cleanup if we're pretending a request
didn't complete. Return 'false' if the command wasn't actually completed
due to the timeout error injection, and true otherwise.

Signed-off-by: Keith Busch <keith.busch@intel.com>
---
 block/blk-mq.c         | 5 +++--
 include/linux/blk-mq.h | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

Comments

Christoph Hellwig Nov. 26, 2018, 5 p.m. UTC | #1 
On Mon, Nov 26, 2018 at 09:54:28AM -0700, Keith Busch wrote:
> A driver may have internal state to cleanup if we're pretending a request
> didn't complete. Return 'false' if the command wasn't actually completed
> due to the timeout error injection, and true otherwise.
> 
> Signed-off-by: Keith Busch <keith.busch@intel.com>

Looks good,

Reviewed-by: Christoph Hellwig <hch@lst.de>
diff mbox series

Patch

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 37674c1766a7..7c8cfa0cd420 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -638,11 +638,12 @@  static void hctx_lock(struct blk_mq_hw_ctx *hctx, int *srcu_idx)
  *	Ends all I/O on a request. It does not handle partial completions.
  *	The actual completion happens out-of-order, through a IPI handler.
  **/
-void blk_mq_complete_request(struct request *rq)
+bool blk_mq_complete_request(struct request *rq)
 {
 	if (unlikely(blk_should_fake_timeout(rq->q)))
-		return;
+		return false;
 	__blk_mq_complete_request(rq);
+	return true;
 }
 EXPORT_SYMBOL(blk_mq_complete_request);
 
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index ca0520ca6437..6e3da356a8eb 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -298,7 +298,7 @@  void blk_mq_add_to_requeue_list(struct request *rq, bool at_head,
 				bool kick_requeue_list);
 void blk_mq_kick_requeue_list(struct request_queue *q);
 void blk_mq_delay_kick_requeue_list(struct request_queue *q, unsigned long msecs);
-void blk_mq_complete_request(struct request *rq);
+bool blk_mq_complete_request(struct request *rq);
 bool blk_mq_bio_list_merge(struct request_queue *q, struct list_head *list,
 			   struct bio *bio);
 bool blk_mq_queue_stopped(struct request_queue *q);