[Bug 102242] [CI][HSW] assert(level < 128) failed for igt at pm_rpm@sysfs-read

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102242

--- Comment #3 from Jari Tahvanainen <jari.tahvanainen at intel.com> ---
This failure is visible in SKL too.

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
sysfs-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:15426) CRITICAL: Test assertion failure function read_files_from_dir,
file pm_rpm.c:856:
(pm_rpm:15426) CRITICAL: Failed assertion: level < 128
(pm_rpm:15426) CRITICAL: Last errno: 5, Input/output error
(pm_rpm:15426) CRITICAL: error: 128 >= 128
Stack trace:
  #0 [__igt_fail_assert+0x101]
  #1 [read_files_from_dir+0x222]
  #2 [<unknown>+0x222]
  #3 [<unknown>+0x222]
Subtest sysfs-read failed.
**** DEBUG ****
(pm_rpm:15426) DEBUG: Test requirement passed: dir != -1
(pm_rpm:15426) CRITICAL: Test assertion failure function read_files_from_dir,
file pm_rpm.c:856:
(pm_rpm:15426) CRITICAL: Failed assertion: level < 128
(pm_rpm:15426) CRITICAL: Last errno: 5, Input/output error
(pm_rpm:15426) CRITICAL: error: 128 >= 128
****  END  ****
Subtest sysfs-read: FAIL (0,301s)

testrunner at dev-skl-i5-6600k:/opt/source/intel-gpu-tools/tests$ sudo ./pm_rpm
--r sysfs-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 sysfs-read: SUCCESS (0,402s)

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