[Bug 88874] New: [BYT/BSW]igt//pm_rps/reset doesn't exit testing

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88874

            Bug ID: 88874
           Summary: [BYT/BSW]igt//pm_rps/reset doesn't exit testing
           Product: DRI
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: huax.lu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 112958
  --> https://bugs.freedesktop.org/attachment.cgi?id=112958&action=edit
dmesg

==System Environment==
--------------------------
Regression: not sure, it has bug 84896

Non-working platforms: BYT/BSW

==kernel==
--------------------------
drm-intel-nightly/05081c1044aada500676224c0439442624c94646
commit 05081c1044aada500676224c0439442624c94646
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Thu Jan 29 18:04:48 2015 +0100

    drm-intel-nightly: 2015y-01m-29d-17h-04m-28s UTC integration manifest

==Bug detailed description==
-----------------------------
It takes more than 10 minutes, and doesn't exit testing. bug 84896's crash goes
away.

output:
IGT-Version: 1.9-g7848d21 (x86_64) (Linux:
3.19.0-rc6_drm-intel-nightly_05081c_20150130+ x86_64)
^C(pm_rps:4225) CRITICAL: Test assertion failure function load_helper_stop,
file pm_rps.c:290:
(pm_rps:4225) CRITICAL: Failed assertion: igt_wait_helper(&lh.igt_proc) == 0
(pm_rps:4225) CRITICAL: Last errno: 10, No child processes
Subtest reset: FAIL (646.744s)
pm_rps: igt_core.c:1012: fork_helper_exit_handler: Assertion
`helper_process_count == 0' failed.
Aborted (core dumped)

real    10m47.581s
user    0m0.364s
sys     0m1.433s

==Reproduce steps==
---------------------------- 
1. time ./pm_rps --run-subtest reset

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