dm table: fix write same support

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 <bharata.rao@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org # v3.8+
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index e50dad0c65f4759d535b5cf81b0258a3b27066b5..1ff252ab7d46a1ed55fb98a93426acfb764998dd 100644 (file)
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -1442,7 +1442,7 @@ static bool dm_table_supports_write_same(struct dm_table *t)
                        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;
        }