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<base href="https://bugs.freedesktop.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI][HSW] Unclaimed read from register 0x70008"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102249">102249</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[CI][HSW] Unclaimed read from register 0x70008
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>DRI git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</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>martin.peres@free.fr
</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>The test igt@kms_busy@extended-modeset-hang-newfb-with-reset-render-C spewed
the following warning when running on haswell:
[ 122.858359] Unclaimed read from register 0x70008
[ 122.858387] ------------[ cut here ]------------
[ 122.858407] WARNING: CPU: 5 PID: 63 at
drivers/gpu/drm/i915/intel_uncore.c:792 __unclaimed_reg_debug+0x47/0x60 [i915]
[ 122.858409] Modules linked in: vgem snd_hda_codec_hdmi i915
x86_pkg_temp_thermal intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul
snd_hda_codec_realtek snd_hda_codec_generic ghash_clmulni_intel snd_hda_intel
snd_hda_codec snd_hwdep snd_hda_core r8169 mei_me mii snd_pcm lpc_ich
prime_numbers mei
[ 122.858476] CPU: 5 PID: 63 Comm: kworker/5:1 Tainted: G U
4.13.0-rc5-CI-CI_DRM_2968+ #1
[ 122.858479] Hardware name: MSI MS-7924/Z97M-G43(MS-7924), BIOS V1.12
02/15/2016
[ 122.858501] Workqueue: events_long i915_hangcheck_elapsed [i915]
[ 122.858506] task: ffff88040d1d0040 task.stack: ffffc90000254000
[ 122.858528] RIP: 0010:__unclaimed_reg_debug+0x47/0x60 [i915]
[ 122.858531] RSP: 0018:ffffc900002579d8 EFLAGS: 00010096
[ 122.858536] RAX: 0000000000000024 RBX: 0000000000000000 RCX:
0000000000000002
[ 122.858538] RDX: 0000000080000002 RSI: ffffffff81c9f973 RDI:
00000000ffffffff
[ 122.858541] RBP: ffffc900002579f0 R08: 0000000000000000 R09:
0000000000000001
[ 122.858543] R10: ffffc90000257968 R11: 0000000089e5bf7e R12:
0000000000070008
[ 122.858545] R13: 0000000000000001 R14: 0000000000000000 R15:
ffff880400bd0ba0
[ 122.858548] FS: 0000000000000000(0000) GS:ffff88041fb40000(0000)
knlGS:0000000000000000
[ 122.858551] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 122.858553] CR2: 0000006149bc2200 CR3: 0000000003e0f000 CR4:
00000000001406e0
[ 122.858555] Call Trace:
[ 122.858578] gen6_read32+0x22d/0x2b0 [i915]
[ 122.858600] ? fwtable_read8+0x2c0/0x2c0 [i915]
[ 122.858617] intel_modeset_setup_hw_state+0x786/0xe00 [i915]
[ 122.858634] __intel_display_resume+0x1f/0xd0 [i915]
[ 122.858650] intel_finish_reset+0xff/0x170 [i915]
[ 122.858661] i915_reset_device+0x205/0x260 [i915]
[ 122.858673] ? gen8_gt_irq_ack+0x170/0x170 [i915]
[ 122.858678] ? work_on_cpu_safe+0x60/0x60
[ 122.858691] i915_handle_error+0x2d8/0x430 [i915]
[ 122.858695] ? vsnprintf+0xd1/0x4b0
[ 122.858699] ? scnprintf+0x3a/0x70
[ 122.858715] hangcheck_declare_hang+0xd3/0xf0 [i915]
[ 122.858728] ? intel_runtime_pm_put+0x56/0xa0 [i915]
[ 122.858745] i915_hangcheck_elapsed+0x262/0x2d0 [i915]
[ 122.858750] process_one_work+0x224/0x650
[ 122.858754] worker_thread+0x4e/0x3b0
[ 122.858757] kthread+0x114/0x150
[ 122.858759] ? process_one_work+0x650/0x650
[ 122.858761] ? kthread_create_on_node+0x40/0x40
[ 122.858763] ? kthread_create_on_node+0x40/0x40
[ 122.858765] ret_from_fork+0x27/0x40
[ 122.858770] Code: 01 75 31 84 db 75 2d 45 84 ed 48 c7 c0 35 ae 28 a0 48 c7
c6 2b ae 28 a0 48 0f 44 f0 44 89 e2 48 c7 c7 3e ae 28 a0 e8 ca 1f f2 e0 <0f> ff
83 2d 8c f5 0f 00 01 5b 41 5c 41 5d 5d c3 66 0f 1f 84 00
[ 122.858848] ---[ end trace 102ab81f8845a0ae ]---
Full results:
<a href="https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_2968/shard-hsw4/igt@kms_busy@extended-modeset-hang-newfb-with-reset-render-C.html">https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_2968/shard-hsw4/igt@kms_busy@extended-modeset-hang-newfb-with-reset-render-C.html</a></pre>
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