diff options
| author | Bart Van Assche <bart.vanassche@sandisk.com> | 2015-12-15 16:38:22 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-12 09:08:53 -0700 |
| commit | 1a8f4a490871df59d1f3cfe28fae4458d2cbef7f (patch) | |
| tree | 64261037c7de577027287def57b43b83d386dc7c /drivers/block | |
| parent | 93272beafa9d9a5933590c90d2fa525e86e67032 (diff) | |
| download | linux-stable-1a8f4a490871df59d1f3cfe28fae4458d2cbef7f.tar.gz linux-stable-1a8f4a490871df59d1f3cfe28fae4458d2cbef7f.tar.bz2 linux-stable-1a8f4a490871df59d1f3cfe28fae4458d2cbef7f.zip | |
brd: Fix discard request processing
commit 5e4298be45e83ecdffaabb370eea9396889b07f1 upstream.
Avoid that discard requests with size => PAGE_SIZE fail with
-EIO. Refuse discard requests if the discard size is not a
multiple of the page size.
Fixes: 2dbe54957636 ("brd: Refuse improperly aligned discard requests")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Jan Kara <jack@suse.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Robert Elliot <elliott@hp.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/brd.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/block/brd.c b/drivers/block/brd.c index a5880f4ab40e..1914c63ca8b1 100644 --- a/drivers/block/brd.c +++ b/drivers/block/brd.c @@ -338,7 +338,7 @@ static blk_qc_t brd_make_request(struct request_queue *q, struct bio *bio) if (unlikely(bio->bi_rw & REQ_DISCARD)) { if (sector & ((PAGE_SIZE >> SECTOR_SHIFT) - 1) || - bio->bi_iter.bi_size & PAGE_MASK) + bio->bi_iter.bi_size & ~PAGE_MASK) goto io_error; discard_from_brd(brd, sector, bio->bi_iter.bi_size); goto out; |