diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
index ec70c9f..2f307c4 100644
--- a/drivers/firewire/fw-ohci.c
+++ b/drivers/firewire/fw-ohci.c
@@ -917,10 +917,15 @@
 
 	reg = reg_read(ohci, OHCI1394_NodeID);
 	if (!(reg & OHCI1394_NodeID_idValid)) {
-		fw_error("node ID not valid, new bus reset in progress\n");
+		fw_notify("node ID not valid, new bus reset in progress\n");
 		return;
 	}
-	ohci->node_id = reg & 0xffff;
+	if ((reg & OHCI1394_NodeID_nodeNumber) == 63) {
+		fw_notify("malconfigured bus\n");
+		return;
+	}
+	ohci->node_id = reg & (OHCI1394_NodeID_busNumber |
+			       OHCI1394_NodeID_nodeNumber);
 
 	/*
 	 * The count in the SelfIDCount register is the number of
diff --git a/drivers/firewire/fw-ohci.h b/drivers/firewire/fw-ohci.h
index fa15706..dec4f04 100644
--- a/drivers/firewire/fw-ohci.h
+++ b/drivers/firewire/fw-ohci.h
@@ -59,6 +59,8 @@
 #define   OHCI1394_LinkControl_cycleSource	(1 << 22)
 #define OHCI1394_NodeID                       0x0E8
 #define   OHCI1394_NodeID_idValid             0x80000000
+#define   OHCI1394_NodeID_nodeNumber          0x0000003f
+#define   OHCI1394_NodeID_busNumber           0x0000ffc0
 #define OHCI1394_PhyControl                   0x0EC
 #define   OHCI1394_PhyControl_Read(addr)	(((addr) << 8) | 0x00008000)
 #define   OHCI1394_PhyControl_ReadDone		0x80000000