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authorShaohua Li <shli@kernel.org>2013-04-28 18:26:38 +0800
committerNeilBrown <neilb@suse.de>2013-04-30 14:49:36 +1000
commit32f9f570d04461a41bdcd5c1d93b41ebc5ce182a (patch)
tree82fe7220a3d3ea346ad372f2c14bc590cf7ccb82 /drivers/md/raid1.c
parent486adf72ccc0c235754923d47a2270c5dcb0c98b (diff)
MD: ignore discard request for hard disks of hybid raid1/raid10 array
In SSD/hard disk hybid storage, discard request should be ignored for hard disk. We used to be doing this way, but the unplug path forgets it. This is suitable for stable tree since v3.6. Cc: stable@vger.kernel.org Reported-and-tested-by: Markus <M4rkusXXL@web.de> Signed-off-by: Shaohua Li <shli@fusionio.com> Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/raid1.c')
-rw-r--r--drivers/md/raid1.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index c055b92d7eb5..851023e2ba5d 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -981,7 +981,12 @@ static void raid1_unplug(struct blk_plug_cb *cb, bool from_schedule)
while (bio) { /* submit pending writes */
struct bio *next = bio->bi_next;
bio->bi_next = NULL;
- generic_make_request(bio);
+ if (unlikely((bio->bi_rw & REQ_DISCARD) &&
+ !blk_queue_discard(bdev_get_queue(bio->bi_bdev))))
+ /* Just ignore it */
+ bio_endio(bio, 0);
+ else
+ generic_make_request(bio);
bio = next;
}
kfree(plug);