diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 7df85af75371..94daf40ae323 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -960,6 +960,15 @@ static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match)
 }
 #endif /* MAX_HWIFS > 1 */
 
+static inline int hwif_to_node(ide_hwif_t *hwif)
+{
+	if (hwif->pci_dev)
+		return pcibus_to_node(hwif->pci_dev->bus);
+	else
+		/* Add ways to determine the node of other busses here */
+		return -1;
+}
+
 /*
  * init request queue
  */
@@ -978,8 +987,7 @@ static int ide_init_queue(ide_drive_t *drive)
 	 *	do not.
 	 */
 
-	q = blk_init_queue_node(do_ide_request, &ide_lock,
-				pcibus_to_node(drive->hwif->pci_dev->bus));
+	q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif));
 	if (!q)
 		return 1;
 
@@ -1048,6 +1056,8 @@ static int init_irq (ide_hwif_t *hwif)
 
 	BUG_ON(in_interrupt());
 	BUG_ON(irqs_disabled());	
+	BUG_ON(hwif == NULL);
+
 	down(&ide_cfg_sem);
 	hwif->hwgroup = NULL;
 #if MAX_HWIFS > 1
@@ -1097,7 +1107,7 @@ static int init_irq (ide_hwif_t *hwif)
 		spin_unlock_irq(&ide_lock);
 	} else {
 		hwgroup = kmalloc_node(sizeof(ide_hwgroup_t), GFP_KERNEL,
-			pcibus_to_node(hwif->drives[0].hwif->pci_dev->bus));
+					hwif_to_node(hwif->drives[0].hwif));
 		if (!hwgroup)
 	       		goto out_up;