Don't try to use bogus bridge data

If, for whatever reason, we weren't able to read bridge data (therefore
leaving bridge.pci or bridge.pcmcia empty), we shouldn't try to look at
the bus data inside the pci/pcmcia struct.

diff --git a/src/common_bridge.c b/src/common_bridge.c
index 2480ba8..7f26bdc 100644 (file)
--- a/src/common_bridge.c
+++ b/src/common_bridge.c
@@ -270,6 +270,10 @@ pci_device_get_bridge_buses(struct pci_device * dev, int *primary_bus,
        return ENODEV;
     }
 
+    if (!priv->bridge.pci) {
+       return ENODEV;
+    }
+
     switch ((dev->device_class >> 8) & 0x0ff) {
     case 0x00:
        /* What to do for host bridges?  I'm pretty sure this isn't right.