[Bug 81374] [BSW Regression]igt/drv_hangman/error-state-capture-blt causes "[drm:i915_context_is_banned] *ERROR* gpu hanging too fast, banning!" sporadically

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81374

--- Comment #3 from Guo Jinxian <jinxianx.guo at intel.com> ---
This bug still able to reproduce on latest
-nightly(f326cd0fae7e74011d3c0a8bd2be2cd2e2a45407) on BDW while running test
igt/kms_pipe_crc_basic/hang-read-crc-pipe-C.

[root at x-bdw02 tests]# ./kms_pipe_crc_basic --run-subtest hang-read-crc-pipe-C
IGT-Version: 1.7-gb6ed9fb (x86_64) (Linux:
3.16.0-rc5_drm-intel-nightly_f326cd_20140717_debug+ x86_64)
Test assertion failure function gem_execbuf, file ioctl_wrappers.c:403:
Failed assertion: ret == 0
Last errno: 5, Input/output error
Subtest hang-read-crc-pipe-C: FAIL
[root at x-bdw02 tests]# dmesg -r | egrep "<[1-4]>" |grep drm
<3>[  264.308329] [drm:i915_context_is_banned] *ERROR* gpu hanging too fast,
banning!
<3>[  270.319426] [drm:i915_context_is_banned] *ERROR* gpu hanging too fast,
banning!

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