[Bug 82939] [BYT]igt/pm_rpm some subcases cause "WARNING: CPU: 1 PID: 18504 at drivers/gpu/drm/i915/intel_uncore.c:47 gen6_write32+0x64/0xbf [i915]()"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82939

Guo Jinxian <jinxianx.guo at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |ASSIGNED

--- Comment #4 from Guo Jinxian <jinxianx.guo at intel.com> ---
(In reply to Imre Deak from comment #3)
> Created attachment 108692 [details] [review]
> fix rps interrupt race wrt. rps work when disabling rps

With the patches above, the failure unable to reproduce.

root at x-bytm02:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./pm_rpm
--run-subtest cursor
IGT-Version: 1.8-gcba3088 (x86_64) (Linux: 3.18.0-rc2_kcloud_3479f9_20141031+
x86_64)
Runtime PM support: 1
PC8 residency support: 0
Subtest cursor: SUCCESS (8.684s)
root at x-bytm02:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# dmesg -r|egrep
"<[1-4]>"|grep drm

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