[Bug 89600] [BSW] GPU hangs after S3+S4, if execlists enabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89600

--- Comment #27 from Jeff Zheng <jeff.zheng at intel.com> ---
(In reply to Chris Harris from comment #26)
> The possible fix from Peter is at:
> 
> https://patchwork.freedesktop.org/patch/48028/
> 
> Please could you try this patch and see if it fixes the problem?


On BSW, I apply the patch to drm-intel-testing-2015-04-23. I tried 10 S3 and
then S3+S4 3 times and could not reproduce this issue.

Without the patch, I can easily reproduce this issue.

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