This is the part for multipath. Since multipatch already attaches
private data into original bio, we just disable write same there.
Signed-off-by: Shaohua Li <shli@xxxxxx>
---
drivers/md/multipath.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index aa8c4e5c..5ee9579 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -89,6 +89,10 @@ static void multipath_end_request(struct bio *bio)
struct mpconf *conf = mp_bh->mddev->private;
struct md_rdev *rdev = conf->multipaths[mp_bh->path].rdev;
+ if (bio_op(bio) == REQ_OP_WRITE_SAME && bio->bi_error == -EREMOTEIO &&
+ !bdev_get_queue(bio->bi_bdev)->limits.max_write_same_sectors)
+ mp_bh->mddev->queue->limits.max_write_same_sectors = 0;
+
if (!bio->bi_error)
multipath_end_bh_io(mp_bh, 0);
else if (!(bio->bi_opf & REQ_RAHEAD)) {
--
2.9.3
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