I think that if a PCI bus is a root bus, attached to a host bridge not a
authorDave Airlie <airlied@starflyer.(none)>
Wed, 23 Nov 2005 10:45:43 +0000 (21:45 +1100)
committerDave Airlie <airlied@linux.ie>
Wed, 23 Nov 2005 10:45:43 +0000 (21:45 +1100)
PCI->PCI bridge, then bus->self is allowed to be NULL. Certainly that's
the case on my Pegasos, and it makes the MGA DRM driver oops...

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Dave Airlie <airlied@linux.ie>
drivers/char/drm/mga_drv.c

index 0cc7c305a7f63b87332656afaa040bf9ba2b1a79..1713451a5cc658ba0ca1c8ef291076010c78c7d6 100644 (file)
@@ -161,7 +161,7 @@ static int mga_driver_device_is_agp(drm_device_t * dev)
         * device.
         */
 
-       if ((pdev->device == 0x0525)
+       if ((pdev->device == 0x0525) && pdev->bus->self
            && (pdev->bus->self->vendor == 0x3388)
            && (pdev->bus->self->device == 0x0021)) {
                return 0;