[Bug 93580] intel_fbdev_restore_mode derefence null pointer

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93580

Chris Wilson <chris at chris-wilson.co.uk> changed:

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

--- Comment #18 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to Kim Lidström from comment #17)
> Hi!
> I attached the log output I could retrieve from the last freeze.
> 
> I'm running 4.7.0-rc5 with the patches applied and drm.debug=0xe

I don't see the fbdev issue in there, but lots of
kernel: WARNING: CPU: 3 PID: 970 at drivers/gpu/drm/i915/intel_pm.c:3647
skl_update_other_pipe_wm+0x177/0x180 [i915]
kernel: WARN_ON(!wm_changed)

Please do file a separate but for that WARN and mention all steps that lead up
to the freeze, even if just "it freezes at random with no forewarning".

I am going to tentatively close this fbdev one following:

commit e77018f7618960f7ec0e73e63868514ff16f8ddc
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Tue Jun 21 09:16:55 2016 +0100

    drm/i915/fbdev: Flush mode configuration before lastclose

Please do reopen if you can reproduce the fbdev oops on a recent (-nightly)
kernel.

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