Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Mike Snitzer <snitzer@xxxxxxxxxx>
Cc: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Cc: Dmitry Monakhov <dmonakhov@xxxxxxxxxx>
---
drivers/block/brd.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index 7e0a54e..a757c7b 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -339,8 +339,9 @@ static blk_qc_t brd_make_request(struct request_queue *q, struct bio *bio)
blk_queue_split(q, &bio, q->bio_split);
if (unlikely(bio->bi_rw & REQ_DISCARD)) {
- if (sector & ((PAGE_SIZE >> SECTOR_SHIFT) - 1) ||
- bio->bi_iter.bi_size & ~PAGE_MASK)
+ if (bio->bi_iter.bi_size &&
+ (sector & ((PAGE_SIZE >> SECTOR_SHIFT) - 1) ||
+ bio->bi_iter.bi_size & ~PAGE_MASK))
goto io_error;
discard_from_brd(brd, sector, bio->bi_iter.bi_size);
goto out;
--
2.1.4
--
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