gru: fix automatic retry of gru instruction failures

Fix bug in automatic retry of GRU instruction failures.  CBR substatus
(message queue failure) was being checked incorrectly.
Signed-off-by: NJack Steiner <steiner@sgi.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/misc/sgi-gru/grukservices.c

@@ -436,11 +436,10 @@ static int gru_retry_exception(void *cb)
 	int retry = EXCEPTION_RETRY_LIMIT;
 
 	while (1)  {
-		if (gru_get_cb_message_queue_substatus(cb))
-			break;
 		if (gru_wait_idle_or_exception(gen) == CBS_IDLE)
 			return CBS_IDLE;
-
+		if (gru_get_cb_message_queue_substatus(cb))
+			return CBS_EXCEPTION;
 		gru_get_cb_exception_detail(cb, &excdet);
 		if ((excdet.ecause & ~EXCEPTION_RETRY_BITS) ||
 				(excdet.cbrexecstatus & CBR_EXS_ABORT_OCC))