A virtual PCI controller may not have a bridge device, thus when
__pci_bus_size_bridges is called, it will generate a NULL pointer
exception when accessing bus->self->class. The attached patch adds a
check to verify if a bridge has been set. Without a bridge device, the
function returns.
Signed-off-by: David Engraf <david.engraf <at> sysgo.com>
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 55641a3..ddb3381 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -1245,6 +1245,10 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
if (pci_is_root_bus(bus))
return;
+ /* bridge device available? */
+ if (!bus->self)
+ return;
+
switch (bus->self->class >> 8) {
case PCI_CLASS_BRIDGE_CARDBUS:
/* don't size cardbuses yet. */
