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<base href="https://bugs.freedesktop.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [ILK]igt/drv_suspend/sysfs-reader cause dmesg warn."
href="https://bugs.freedesktop.org/show_bug.cgi?id=88911">88911</a>
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<th>Summary</th>
<td>[ILK]igt/drv_suspend/sysfs-reader cause dmesg warn.
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>DRI git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>medium
</td>
</tr>
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<th>Component</th>
<td>DRM/Intel
</td>
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<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>hengx.ding@intel.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=113037" name="attach_113037" title="dmesg for case igt/drv_suspend/sysfs-reader">attachment 113037</a> <a href="attachment.cgi?id=113037&action=edit" title="dmesg for case igt/drv_suspend/sysfs-reader">[details]</a></span>
dmesg for case igt/drv_suspend/sysfs-reader
==System Environment==
--------------------------
Regression: yes
Non-working platforms: ILK
==kernel==
--------------------------
drm-intel-nightly/8b4216f91c7bf8d3459cadf9480116220bd6545e(2015-02-02)
==Bug detailed description==
-----------------------------
check dmesg after run this case.
dmesg -r|egrep "<[1-4]>"|grep drm
<4>[ 1.415809] WARNING: CPU: 3 PID: 1219 at
drivers/gpu/drm/i915/intel_uncore.c:169
intel_uncore_forcewake_reset+0x18b/0x27e [i915]()
<4>[ 1.416176] i915(+) button video drm_kms_helper drm cfbfillrect
cfbimgblt cfbcopyarea
<4>[ 1.416178] CPU: 3 PID: 1219 Comm: udevd Not tainted
3.19.0-rc6_drm-intel-nightly_8b4216_20150202+ #126
<4>[ 1.416338] [<ffffffffa00135ac>] ? drm_dev_register+0x74/0xe6 [drm]
<4>[ 1.416344] [<ffffffffa0015952>] ? drm_get_pci_dev+0xf7/0x1b2 [drm]
<4>[ 100.666822] WARNING: CPU: 2 PID: 3798 at
drivers/gpu/drm/i915/intel_uncore.c:169
intel_uncore_forcewake_reset+0x18b/0x27e [i915]()
<4>[ 100.666838] Modules linked in: ip6table_filter ip6_tables ebtable_nat
ebtables nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT
nf_reject_ipv4 iptable_mangle xt_tcpudp iptable_filter ip_tables x_tables
bridge stp llc ipv6 dm_mod snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_codec_generic iTCO_wdt iTCO_vendor_support ppdev dcdbas serio_raw
pcspkr i2c_i801 snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep
snd_pcm wmi snd_timer lpc_ich mfd_core snd soundcore parport_pc parport tpm_tis
tpm acpi_cpufreq i915 button video drm_kms_helper drm cfbfillrect cfbimgblt
cfbcopyarea
<4>[ 100.666841] CPU: 2 PID: 3798 Comm: kworker/u16:13 Tainted: G W
3.19.0-rc6_drm-intel-nightly_8b4216_20150202+ #126
<4>[ 100.666885] [<ffffffffa00858dd>] ? i915_drm_suspend+0x17d/0x1b3 [i915]
<4>[ 101.073540] WARNING: CPU: 1 PID: 3826 at
drivers/gpu/drm/i915/intel_uncore.c:169
intel_uncore_forcewake_reset+0x18b/0x27e [i915]()
<4>[ 101.073557] Modules linked in: ip6table_filter ip6_tables ebtable_nat
ebtables nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT
nf_reject_ipv4 iptable_mangle xt_tcpudp iptable_filter ip_tables x_tables
bridge stp llc ipv6 dm_mod snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_codec_generic iTCO_wdt iTCO_vendor_support ppdev dcdbas serio_raw
pcspkr i2c_i801 snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep
snd_pcm wmi snd_timer lpc_ich mfd_core snd soundcore parport_pc parport tpm_tis
tpm acpi_cpufreq i915 button video drm_kms_helper drm cfbfillrect cfbimgblt
cfbcopyarea
<4>[ 101.073560] CPU: 1 PID: 3826 Comm: kworker/u16:41 Tainted: G W
3.19.0-rc6_drm-intel-nightly_8b4216_20150202+ #126
<4>[ 101.073606] [<ffffffffa00863a3>] ? i915_drm_resume_early+0x94/0x94
[i915]
<4>[ 101.073623] [<ffffffffa008636c>] ? i915_drm_resume_early+0x5d/0x94
[i915]
the following cases have the similar dmesg, and bisect result were the same.
igt/drv_suspend/sysfs-reader
igt/drv_suspend/forcewake
igt/drv_suspend/fence-restore-untiled
igt/drv_suspend/fence-restore-tiled2untiled
igt/drv_suspend/debugfs-reader
==Reproduce steps==
----------------------------
1. ./drv_suspend --run-subtest sysfs-reader</pre>
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