Merge remote-tracking branch 'lsk/v3.10/topic/gator' into linux-linaro-lsk

[firefly-linux-kernel-4.4.55.git] / drivers / md / dm-thin.c

diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c
index 7d0ac0a6e724bc2c78af1a55cebfff7a7b19f615..86a2a5e3b26bacdc0c773076cf7283cacd188701 100644 (file)
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -2647,7 +2647,8 @@ static void set_discard_limits(struct pool_c *pt, struct queue_limits *limits)
         */
        if (pt->adjusted_pf.discard_passdown) {
                data_limits = &bdev_get_queue(pt->data_dev->bdev)->limits;
-               limits->discard_granularity = data_limits->discard_granularity;
+               limits->discard_granularity = max(data_limits->discard_granularity,
+                                                 pool->sectors_per_block << SECTOR_SHIFT);
        } else
                limits->discard_granularity = pool->sectors_per_block << SECTOR_SHIFT;
 }