[Bug 80376] [SNB/BDW Regression]igt/kms_flip/vblank-vs-modeset-suspend causes "WARNING: CPU: 2 PID: 1051 at drivers/gpu/drm/i915/i915_irq.c:267 intel_gen6_powersave_work+0xa49/0xf1e [i915]()"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80376

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

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

--- Comment #5 from Guo Jinxian <jinxianx.guo at intel.com> ---
(In reply to comment #3)
> Created attachment 101646 [details] [review]
> [PATCH v3] drm/i915: Leave interrupts enabled while disabling crtcs
> 
> I think it must be caused by this:
> 
> commit e11aa362308f5de467ce355a2a2471321b15a35c
> Author: Jesse Barnes <jbarnes at virtuousgeek.org>
> Date:   Wed Jun 18 09:52:55 2014 -0700
> 
>     drm/i915: use runtime irq suspend/resume in freeze/thaw
> 
> 
> This patch should fix it. I've been trying to sneak it in for a long time
> already but so far it's not made it.

The CallTrace unable to reproduce on latest
-nightly(1087d4bf01e79523898c6c31615bf0c369e0039a), but the test still failed.
Output:
[root at x-sgb3 tests]# ./kms_flip --run-subtest vblank-vs-modeset-suspend
IGT-Version: 1.7-g7ef5372 (x86_64) (Linux:
3.16.0-rc2_drm-intel-nightly_1087d4_20140626+ x86_64)
Using monotonic timestamps
Test assertion failure function run_test, file kms_flip.c:1400:
Last errno: 0, Success
Failed assertion: modes
Subtest vblank-vs-modeset-suspend: FAIL
[root at x-sgb3 tests]# dmesg|grep Call
[root at x-sgb3 tests]#

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