From e5dcdd80a60627371f40797426273048630dc8ca Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Fri, 9 Sep 2005 16:23:41 -0700 Subject: [PATCH] md: fail IO request to md that require a barrier. md does not yet support BIO_RW_BARRIER, so be honest about it and fail (-EOPNOTSUPP) any such requests. Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/md/linear.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/md/linear.c') diff --git a/drivers/md/linear.c b/drivers/md/linear.c index 8d740013d74..4991ba54336 100644 --- a/drivers/md/linear.c +++ b/drivers/md/linear.c @@ -238,6 +238,11 @@ static int linear_make_request (request_queue_t *q, struct bio *bio) dev_info_t *tmp_dev; sector_t block; + if (unlikely(bio_barrier(bio))) { + bio_endio(bio, bio->bi_size, -EOPNOTSUPP); + return 0; + } + if (bio_data_dir(bio)==WRITE) { disk_stat_inc(mddev->gendisk, writes); disk_stat_add(mddev->gendisk, write_sectors, bio_sectors(bio)); -- cgit v1.2.3