As far as I understand, the patch disables power gating which is a very bad thing in terms of power usage so this is not a fix, just a temp workaround.

On 10 Apr 2016 14:32, <bugzilla-daemon@freedesktop.org> wrote:

Comment # 35 on bug 94161 from Gerard Farré
Compiled kernel 4.6 rc2 drm-intel-nightly with the Mika patch (comment #28) and
everything is working fine, no gpu hang at the moment (4 days testing).
Why this patch is not merged? Maybe because needs more testing?

Thanks Mika.
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