[Bug 100717] [CI][HSW] [APL/GLK/SKL/KBL/HSW/BDW/BSW/BYT] pm_rpm at debugfs-read

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100717

--- Comment #14 from Jari Tahvanainen <jari.tahvanainen at intel.com> ---
I did some bisecting related to this and found out that change from pass to
fail was actually caused by igt commit ced87bd9.
commit ced87bd913bfbfb8ecbe6352d87d133e5e4c81ff
Author:     Chris Wilson <chris at chris-wilson.co.uk>
AuthorDate: Sat Apr 8 13:15:18 2017 +0100
Commit:     Chris Wilson <chris at chris-wilson.co.uk>
CommitDate: Sat Apr 8 13:47:53 2017 +0100
    igt/pm_rpm: Use directory fd to track and read entire directories
    Rather than compute the temporary full path name, remember it via the dir
    fd we already have.
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

Here is the actual outputs for this particular test on the latest kernel 
    drm-tip: 2017y-08m-21d-08h-13m-34s UTC integration manifest

dev-skl-i5-6600k:/opt/source/intel-gpu-tools/tests$ sudo ./pm_rpm --r
debugfs-read
IGT-Version: 1.18-gced87bd9 (x86_64) (Linux: 4.13.0-rc5-ezbench_dbfb2f62576e+
x86_64)
Runtime PM support: 1
PC8 residency support: 0
(pm_rpm:1263) CRITICAL: Test assertion failure function read_full_file, file
pm_rpm.c:838:
(pm_rpm:1263) CRITICAL: Failed assertion: wait_for_suspended()
(pm_rpm:1263) CRITICAL: Last errno: 19, No such device
(pm_rpm:1263) CRITICAL: File: i915_forcewake_user
Stack trace:
  #0 [__igt_fail_assert+0x101]
  #1 [read_files_from_dir+0x275]
  #2 [main+0x1a86]
  #3 [__libc_start_main+0xf1]
  #4 [_start+0x2a]
  #5 [<unknown>+0x2a]
Subtest debugfs-read failed.
**** DEBUG ****
(pm_rpm:1263) CRITICAL: Test assertion failure function read_full_file, file
pm_rpm.c:838:
(pm_rpm:1263) CRITICAL: Failed assertion: wait_for_suspended()
(pm_rpm:1263) CRITICAL: Last errno: 19, No such device
(pm_rpm:1263) CRITICAL: File: i915_forcewake_user
****  END  ****
Subtest debugfs-read: FAIL (12,578s)

dev-skl-i5-6600k:/opt/source/intel-gpu-tools/tests$ sudo ./pm_rpm --r
debugfs-read
IGT-Version: 1.18-gc3268d9a (x86_64) (Linux: 4.13.0-rc5-ezbench_dbfb2f62576e+
x86_64)
Runtime PM support: 1
PC8 residency support: 0
Subtest debugfs-read: SUCCESS (2,729s)

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