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-rw-r--r--drivers/pcmcia/yenta_socket.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/pcmcia/yenta_socket.c b/drivers/pcmcia/yenta_socket.c
index f0997c36c9b..2e43911b487 100644
--- a/drivers/pcmcia/yenta_socket.c
+++ b/drivers/pcmcia/yenta_socket.c
@@ -1045,7 +1045,18 @@ static int __devinit yenta_probe (struct pci_dev *dev, const struct pci_device_i
{
struct yenta_socket *socket;
int ret;
-
+
+ /*
+ * If we failed to assign proper bus numbers for this cardbus
+ * controller during PCI probe, its subordinate pci_bus is NULL.
+ * Bail out if so.
+ */
+ if (!dev->subordinate) {
+ printk(KERN_ERROR "Yenta: no bus associated with %s!\n",
+ pci_name(dev));
+ return -ENODEV;
+ }
+
socket = kmalloc(sizeof(struct yenta_socket), GFP_KERNEL);
if (!socket)
return -ENOMEM;