[Bug 104162] [BAT] [BDW only] igt at kms_pipe_crc_basic@suspend-read-crc-pipe-c -incomplete timeout/system hang?

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104162

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
Possibly:

commit 16c8619a7c53fe05526c31d4758be0eeabd16364
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Tue Dec 19 22:09:16 2017 +0000

    drm/i915: Avoid context dereference inside execlists_submission_tasklet

    A lesson that has to be relearnt over and over again is that the request
    does not keep a reference to the context and so we cannot freely
    dereference the context from inside the execlists_submission_tasklet. In
    particular, we try to do so in the new GEM_TRACE() so convert those over
    to the port->context_id we keep for GEM debugging. This means the
    tracing now depends on DRM_I915_GEM_DEBUG.

    Fixes: bccd3b831185 ("drm/i915: Use trace_printk to provide a death rattle
for GEM")
    References: https://bugs.freedesktop.org/show_bug.cgi?id=104066
    References: https://bugs.freedesktop.org/show_bug.cgi?id=104162
    References: https://bugs.freedesktop.org/show_bug.cgi?id=104242
    References: https://bugs.freedesktop.org/show_bug.cgi?id=104310
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
    Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
    Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
    Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
    Reviewed-by: Michel Thierry <michel.thierry at intel.com>
    Link:
https://patchwork.freedesktop.org/patch/msgid/20171219220916.30882-1-chris@chris-wilson.co.uk

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