[Bug 78685] [ILK Regression]igt/gem_reset_stats/ban-render causes GPU hang and *ERROR* render ring :timed out trying to stop ring

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78685

lu hua <huax.lu at intel.com> changed:

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

--- Comment #6 from lu hua <huax.lu at intel.com> ---
Bisect shows: e9fea5747d2b3dbff47a8790c1cc4d7af80051d6 is the first bad commit
commit e9fea5747d2b3dbff47a8790c1cc4d7af80051d6
Author: Naresh Kumar Kachhi <naresh.kumar.kachhi at intel.com>
Date:   Wed Mar 12 16:39:41 2014 +0530

    drm/i915: wait for rings to become idle once disabled

    make sure we wait for rings to become idle once they are
    disabled. In case of timeout print an error message

    Signed-off-by: Naresh Kumar Kachhi <naresh.kumar.kachhi at intel.com>
    [danvet: Frob patch as suggested by Chris.]
    Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

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