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block: clear REQ_HIPRI if polling is not supported 

This prevents a HIPRI bio from being submitted through a stacking
driver that does not support polling and thus won't poll for I/O
completion.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2018-12-14 17:21:22 +01:00 committed by Jens Axboe
parent d6a51a97c0
commit d04c406f29
1 changed files with 3 additions and 0 deletions
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3
block/blk-core.c
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@ -921,6 +921,9 @@ generic_make_request_checks(struct bio *bio)
}
}
if (!test_bit(QUEUE_FLAG_POLL, &q->queue_flags))
bio->bi_opf &= ~REQ_HIPRI;
switch (bio_op(bio)) {
case REQ_OP_DISCARD:
if (!blk_queue_discard(q))