[Bug 72631] [BDW]igt/kms_flip/flip-vs-modeset-vs-hang-interruptible randomly causes system hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72631

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #15 from lu hua <huax.lu at intel.com> ---
(In reply to comment #14)
> Created attachment 94296 [details] [review]
> drm/i915: Fix forcewake counts for gen8

Test this patch, It core dumped, doesn't cause system hang.

output:
Using monotonic timestamps
Beginning flip-vs-modeset-vs-hang-interruptible on crtc 3, connector 10
  1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48 138780
..Test assertion failure function exec_nop, file kms_flip.c:693:
Last errno: 5, Input/output error
Failed assertion: drmIoctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &execbuf) == 0
Subtest flip-vs-modeset-vs-hang-interruptible: FAIL
Test assertion failure function gem_quiescent_gpu, file drmtest.c:156:
Last errno: 5, Input/output error
Failed assertion: drmIoctl((fd), ((((1U) << (((0+8)+8)+14)) | ((('d')) <<
(0+8)) | (((0x40 + 0x29)) << 0) | ((((sizeof(struct
drm_i915_gem_execbuffer2)))) << ((0+8)+8)))), (&execbuf)) == 0
kms_flip: drmtest.c:1113: igt_fail: Assertion `!test_with_subtests ||
in_fixture' failed.
Aborted (core dumped)

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