X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=drivers%2Fmd%2Fdm-cache-target.c;h=677973641d2ba916e3128780192e2a21711eae81;hb=abc2159654f50005bab3b6e03c5db269195dac4f;hp=1a75869d3a825dd646bec2940ffd4eea3d0435ad;hpb=f669f023e2ce45ab6e289bd980d435e1dae0e362;p=firefly-linux-kernel-4.4.55.git

diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
index 1a75869d3a82..677973641d2b 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -1954,6 +1954,8 @@ static int cache_create(struct cache_args *ca, struct cache **result)
 	ti->num_discard_bios = 1;
 	ti->discards_supported = true;
 	ti->discard_zeroes_data_unsupported = true;
+	/* Discard bios must be split on a block boundary */
+	ti->split_discard_bios = true;
 
 	cache->features = ca->features;
 	ti->per_bio_data_size = get_per_bio_data_size(cache);