From: Mike Snitzer <[email-masked]>

If device_not_write_same_capable() returns true then the iterate_devices
loop in dm_table_supports_write_same() should return false.

Reported-by: Bharata B Rao <[email-masked]>
Signed-off-by: Mike Snitzer <[email-masked]>
Cc: [email-masked] # v3.8+
Signed-off-by: Alasdair G Kergon <[email-masked]>

---
 drivers/md/dm-table.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux/drivers/md/dm-table.c
===================================================================
--- linux.orig/drivers/md/dm-table.c
+++ linux/drivers/md/dm-table.c
@@ -1442,7 +1442,7 @@ static bool dm_table_supports_write_same
 			return false;
 
 		if (!ti->type->iterate_devices ||
-		    !ti->type->iterate_devices(ti, device_not_write_same_capable, NULL))
+		    ti->type->iterate_devices(ti, device_not_write_same_capable, NULL))
 			return false;
 	}