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[PATCH] md: fail IO request to md that require a barrier.

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md does not yet support BIO_RW_BARRIER, so be honest about it and fail
(-EOPNOTSUPP) any such requests.

Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
NeilBrown
2005-09-09 16:23:41 -07:00
committed by Linus Torvalds
parent 3ec67ac1a3
commit e5dcdd80a6
7 changed files with 34 additions and 0 deletions
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5
drivers/md/raid6main.c
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@@ -1570,6 +1570,11 @@ static int make_request (request_queue_t *q, struct bio * bi)
sector_t logical_sector, last_sector;
struct stripe_head *sh;
if (unlikely(bio_barrier(bi))) {
bio_endio(bi, bi->bi_size, -EOPNOTSUPP);
return 0;
}
md_write_start(mddev, bi);
if (bio_data_dir(bi)==WRITE) {