[Bug 107792] [CI][DRMTIP] igt at kms_frontbuffer_tracking@ - incomplete - BUG: unable to handle kernel NULL pointer dereference at 0000000000000080 in intel_psr_set_debugfs_mode

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107792

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

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

--- Comment #3 from Chris Wilson <chris at chris-wilson.co.uk> ---
Actually pushed,

commit 9d3f8d2ff777b94993581bdfe5c595c619429624
(drm-intel/drm-intel-next-queued)
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Tue Sep 4 17:29:02 2018 +0100

    drm/i915: Be defensive and don't assume PSR has any commit to sync against

    If the previous modeset commit has completed and is no longer part of
    the crtc state, skip waiting for it.

    Ville pointed out that, in fact, the commit is never removed after a
    modeset so the only way we could see a NULL here should be if there was
    never a commit attached. Nevertheless, we have the evidence it can be
    NULL and it has been defended against elsewhere, for example commit
    93313538c153 ("drm/i915: Pass idle crtc_state to intel_dp_sink_crc").

That we also check for commit being NULL elsewhere was the clincher.

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