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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 - [HSW Regression]igt/pm_rps/reset causes drivers/gpu/drm/i915/i915_irq.c:284 gen6_enable_rps_interrupts+0x34/0x94 [i915]"
href="https://bugs.freedesktop.org/show_bug.cgi?id=87182">87182</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[HSW Regression]igt/pm_rps/reset causes drivers/gpu/drm/i915/i915_irq.c:284 gen6_enable_rps_interrupts+0x34/0x94 [i915]
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>high
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>huax.lu@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>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=110665" name="attach_110665" title="dmesg">attachment 110665</a> <a href="attachment.cgi?id=110665&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: Yes
good commit: 0b5492d6b53251acab99b1906a328fac56e08be3
bad commit: b05ddd4dfb6303ee9dde359ec913aa7a918fd81
Non-working platforms: HSW
==kernel==
--------------------------
drm-intel-nightly/34d267c2ba9c0845432baf959a2c4deed87f3ee4
drm-intel-next-queued/b05ddd4dfb6303ee9dde359ec913aa7a918fd81
drm-intel-fixes/b0616c5306b342ceca07044dbc4f917d95c4f825
==Bug detailed description==
-----------------------------
It happens on drm-intel-nightly and drm-intel-next-queued kernel, works well on
drm-intel-fixes kernel.
output:
IGT-Version: 1.8-gf333981 (x86_64) (Linux:
3.18.0_drm-intel-nightly_34d267_20141209+ x86_64)
Subtest reset: SUCCESS (40.392s)
dmesg:
[ 161.967391] ------------[ cut here ]------------
[ 161.968586] WARNING: CPU: 0 PID: 794 at drivers/gpu/drm/i915/i915_irq.c:284
gen6_enable_rps_interrupts+0x34/0x94 [i915]()
[ 161.969798] WARN_ON(dev_priv->rps.pm_iir)
[ 161.969813] Modules linked in: netconsole configfs battery dm_mod
tpm_infineon wmi tpm_tis tpm acpi_cpufreq i915 button video drm_kms_helper drm
cfbfillrect cfbimgblt cfbcopyarea [last unloaded: netconsole]
[ 161.972961] CPU: 0 PID: 794 Comm: kworker/0:1 Not tainted
3.18.0_drm-intel-nightly_34d267_20141209+ #2416
[ 161.974740] Hardware name: ASUS All Series/Z87-EXPERT, BIOS 1008 05/17/2013
[ 161.976538] Workqueue: events intel_gen6_powersave_work [i915]
[ 161.978341] 0000000000000000 0000000000000009 ffffffff8178d5e2
ffff880255e87d58
[ 161.980173] ffffffff8103a8cc ffff880200000000 ffffffffa00b07e4
0000000000000246
[ 161.982011] ffff880250860000 ffff88025119f800 ffff8802508686d8
0000000000040000
[ 161.983846] Call Trace:
[ 161.985666] [<ffffffff8178d5e2>] ? dump_stack+0x41/0x51
[ 161.987504] [<ffffffff8103a8cc>] ? warn_slowpath_common+0x78/0x90
[ 161.989349] [<ffffffffa00b07e4>] ? gen6_enable_rps_interrupts+0x34/0x94
[i915]
[ 161.991204] [<ffffffff8103a97c>] ? warn_slowpath_fmt+0x45/0x4a
[ 161.993055] [<ffffffffa008bd8f>] ? __gen6_update_ring_freq+0x133/0x14f
[i915]
[ 161.994898] [<ffffffffa00b07e4>] ? gen6_enable_rps_interrupts+0x34/0x94
[i915]
[ 161.996722] [<ffffffffa008dba0>] ? intel_gen6_powersave_work+0xfa9/0xfca
[i915]
[ 161.998534] [<ffffffff8104bbed>] ? process_one_work+0x1ae/0x31c
[ 162.000329] [<ffffffff8104bfd5>] ? worker_thread+0x255/0x350
[ 162.002108] [<ffffffff8104bd80>] ? process_scheduled_works+0x25/0x25
[ 162.003878] [<ffffffff8104f81e>] ? kthread+0xc5/0xcd
[ 162.005635] [<ffffffff8104f759>] ? kthread_freezable_should_stop+0x40/0x40
[ 162.007401] [<ffffffff81792bec>] ? ret_from_fork+0x7c/0xb0
[ 162.009170] [<ffffffff8104f759>] ? kthread_freezable_should_stop+0x40/0x40
[ 162.010929] ---[ end trace 2bba719a75829b0c ]---
Reproduce steps:
-------------------------
1. ./pm_rps --run-subtest reset</pre>
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