Fix xor_gen test pass when len % 256 == 0

If len > 255, the return value will be % 256, which causes the test to incorrectly pass

Signed-off-by: sunyuechi <[email protected]>

Author: sunyuechi

raid/raid_base.c

@@ -138,7 +138,5 @@ xor_check_base(int vects, int len, void **array)
                         break;
                 }
         }
-        if (fail && len > 0)
-                return len;
         return fail;
 }