block: remove BLK_EH_HANDLED

Signed-off-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NJens Axboe <axboe@kernel.dk>

Documentation/scsi/scsi_eh.txt

@@ -82,17 +82,6 @@ function
  1. invokes optional hostt->eh_timed_out() callback.  Return value can
     be one of
 
-    - BLK_EH_HANDLED
-	This indicates that eh_timed_out() dealt with the timeout.
-	The command is passed back to the block layer and completed
-	via __blk_complete_requests().
-
-	*NOTE* After returning BLK_EH_HANDLED the SCSI layer is
-	assumed to be finished with the command, and no other
-	functions from the SCSI layer will be called. So this
-	should typically only be returned if the eh_timed_out()
-	handler raced with normal completion.
-
     - BLK_EH_RESET_TIMER
 	This indicates that more time is required to finish the
 	command.  Timer is restarted.  This action is counted as a

block/blk-mq.c

@@ -777,10 +777,6 @@ static void blk_mq_rq_timed_out(struct request *req, bool reserved)
 		ret = ops->timeout(req, reserved);
 
 	switch (ret) {
-	case BLK_EH_HANDLED:
-		if (blk_mq_rq_state(req) == MQ_RQ_IN_FLIGHT)
-			__blk_mq_complete_request(req);
-		break;
 	case BLK_EH_RESET_TIMER:
 		blk_add_timer(req);
 		break;

block/blk-timeout.c

@@ -86,9 +86,6 @@ static void blk_rq_timed_out(struct request *req)
 	if (q->rq_timed_out_fn)
 		ret = q->rq_timed_out_fn(req);
 	switch (ret) {
-	case BLK_EH_HANDLED:
-		__blk_complete_request(req);
-		break;
 	case BLK_EH_RESET_TIMER:
 		blk_add_timer(req);
 		blk_clear_rq_complete(req);

include/linux/blkdev.h

@@ -327,7 +327,6 @@ typedef void (exit_rq_fn)(struct request_queue *, struct request *);
 
 enum blk_eh_timer_return {
 	BLK_EH_DONE,
-	BLK_EH_HANDLED,
 	BLK_EH_RESET_TIMER,
 };