[Bug 107188] [CI][CFL] Occasional hang in drv_selftest at live_workarounds

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107188

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

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

--- Comment #6 from Chris Wilson <chris at chris-wilson.co.uk> ---
commit a99b32a6fff7e482a267c72e565c8c410ce793d7 (HEAD -> drm-intel-next-queued,
drm-intel/drm-intel-next-queued)
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Tue Aug 14 18:18:57 2018 +0100

    drm/i915: Clear stop-engine for a pardoned reset

    If we pardon a per-engine reset, we may leave the STOP_RING bit asserted
    in RING_MI_MODE resulting in the engine hanging. Unconditionally clear
    it on the per-engine exit path as we know that either we skipped the
    reset and so need the cancellation, or the reset was successful and the
    cancellation is a no-op, or there was an error and we will follow up
    with a full-reset or wedging (both of which will stop the engines again
    as required).

    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107188
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=106560
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
    Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
    Reviewed-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>
    Link:
https://patchwork.freedesktop.org/patch/msgid/20180814171857.24673-1-chris@chris-wilson.co.uk

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