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block: fix timeout changes for legacy request drivers 

blk_mq_complete_request can only be called for blk-mq drivers, but when
removing the BLK_EH_HANDLED return value, two legacy request timeout
methods incorrectly got switched to call blk_mq_complete_request.
Call __blk_complete_request instead to reinstance the previous behavior.
For that __blk_complete_request needs to be exported.

Fixes: 1fc2b62e ("scsi_transport_fc: complete requests from ->timeout")
Fixes: 0df0bb08 ("null_blk: complete requests from ->timeout")
Reported-by: Jianchao Wang <jianchao.w.wang@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
hifive-unleashed-5.1
Christoph Hellwig 2018-06-19 18:40:14 +02:00 committed by Jens Axboe
parent d6c73964f1
commit 0cc61e64e2
3 changed files with 3 additions and 2 deletions
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1
block/blk-softirq.c
View File

@ -144,6 +144,7 @@ do_local:
local_irq_restore(flags);
}
EXPORT_SYMBOL(__blk_complete_request);
/**
* blk_complete_request - end I/O on a request

2
drivers/block/null_blk.c
View File

@ -1365,7 +1365,7 @@ static blk_qc_t null_queue_bio(struct request_queue *q, struct bio *bio)
static enum blk_eh_timer_return null_rq_timed_out_fn(struct request *rq)
{
pr_info("null: rq %p timed out\n", rq);
blk_mq_complete_request(rq);
__blk_complete_request(rq);
return BLK_EH_DONE;
}

2
drivers/scsi/scsi_transport_fc.c
View File

@ -3592,7 +3592,7 @@ fc_bsg_job_timeout(struct request *req)
/* the blk_end_sync_io() doesn't check the error */
if (inflight)
blk_mq_complete_request(req);
__blk_complete_request(req);
return BLK_EH_DONE;
}