[Bug 27569] Radeon KMS panic with certain kernel config.

[bugzilla-daemon at freedesktop.org]

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

Nick Bowler <nbowler at draconx.ca> changed:

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

--- Comment #3 from Nick Bowler <nbowler at 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 at 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 at 273k.net>
    Signed-off-by: Dave Airlie <airlied at redhat.com>

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