https://bugs.freedesktop.org/show_bug.cgi?id=27569

Nick Bowler nbowler@draconx.ca changed:

What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED

--- Comment #3 from Nick Bowler nbowler@draconx.ca 2010-05-05 10:41:08 PDT --- Well, looks like this has been fixed in latest Linus' git. More than fixed, in fact: not only does the kernel not panic, but modesetting actually works (appears to fall back to a non-AGP mode of operation).

commit ccb2ad579f910e6146adf4eb3aa50325253ee8c9 Author: Robert Fitzsimons robfitz@273k.net Date: Sat Apr 24 01:18:13 2010 +0100

drm/radeon/kms/agp The wrong AGP chipset can cause a NULL pointer dereference

Selecting the wrong or no CONFIG_AGP_* chipset can cause a NULL pointer dereference when combined with CONFIG_DRM_RADEON_KMS and an old system with a R100 AGP card (should effect other cards too). The agp field will be set to NULL if no suitable AGP chipset driver is loaded, drm_agp_acquire already preforms a suitable NULL check so it can be used directly.

Signed-off-by: Robert Fitzsimons robfitz@273k.net Signed-off-by: Dave Airlie airlied@redhat.com