diff --git a/drivers/misc/sgi-xp/xpc_sn2.c b/drivers/misc/sgi-xp/xpc_sn2.c
index 7aafb8a..7d05fb5 100644
--- a/drivers/misc/sgi-xp/xpc_sn2.c
+++ b/drivers/misc/sgi-xp/xpc_sn2.c
@@ -1957,11 +1957,13 @@
 
 			msg = xpc_pull_remote_msg_sn2(ch, get);
 
-			DBUG_ON(msg != NULL && msg->number != get);
-			DBUG_ON(msg != NULL && (msg->flags & XPC_M_SN2_DONE));
-			DBUG_ON(msg != NULL && !(msg->flags & XPC_M_SN2_READY));
+			if (msg != NULL) {
+				DBUG_ON(msg->number != get);
+				DBUG_ON(msg->flags & XPC_M_SN2_DONE);
+				DBUG_ON(!(msg->flags & XPC_M_SN2_READY));
 
-			payload = &msg->payload;
+				payload = &msg->payload;
+			}
 			break;
 		}