[Bug 99729] [APL] [BAT] igt at gem_exec_fence@await-hang-default fails on CI

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99729

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

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

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

commit 1f7b847d72c3583df5048d83bd945d0c2c524c28
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Wed Feb 8 14:30:33 2017 +0000

    drm/i915: Disable engine->irq_tasklet around resets

    When we restart the engines, and we have active requests, a request on
    the first engine may complete and queue a request to the second engine
    before we try to restart the second engine. That queueing of the
    request may race with the engine to restart, and so may corrupt the
    current state. Disabling the engine->irq_tasklet prevents the two paths
    from writing into ELSP simultaneously (and modifyin the execlists_port[]
    at the same time).

    Fixes: 821ed7df6e2a ("drm/i915: Update reset path to fix incomplete
requests
")
    Testcase: igt/gem_exec_fence/await-hang
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
    Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
    Cc: Mika Kuoppala <mika.kuoppala at intel.com>
    Reviewed-by: Mika Kuoppala <mika.kuoppala at intel.com>
    Link:
http://patchwork.freedesktop.org/patch/msgid/20170208143033.11651-3-ch
ris at chris-wilson.co.uk

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