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blk-mq: dont assume rq->errors is set when returning an error from ->queue_rq 

rq->errors never has been part of the communication protocol between drivers
and the block stack and most drivers will not have initialized it.

Return -EIO to upper layers when the driver returns BLK_MQ_RQ_QUEUE_ERROR
unconditionally.  If a driver want to return a different error it can easily
do so by returning success after calling blk_mq_end_io itself.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig 2014-02-11 08:27:13 -08:00 committed by Jens Axboe
parent 8423ae3d7a
commit 1e93b8c274
1 changed files with 1 additions and 1 deletions
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2
block/blk-mq.c
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@ -605,8 +605,8 @@ static void __blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx)
break; break;
default: default:
pr_err("blk-mq: bad return on queue: %d\n", ret); pr_err("blk-mq: bad return on queue: %d\n", ret);
rq->errors = -EIO;
case BLK_MQ_RQ_QUEUE_ERROR: case BLK_MQ_RQ_QUEUE_ERROR:
rq->errors = -EIO;
blk_mq_end_io(rq, rq->errors); blk_mq_end_io(rq, rq->errors);
break; break;
} }