<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - igt/drv_module_reload causes call trace"
href="https://bugs.freedesktop.org/show_bug.cgi?id=76582">76582</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>igt/drv_module_reload causes call trace
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>huax.lu@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=96341" name="attach_96341" title="dmesg">attachment 96341</a> <a href="attachment.cgi?id=96341&action=edit" title="dmesg">[details]</a></span>
dmesg
System Environment:
--------------------------
Platform: Haswell
Kernel: drm-intel-fixes/0f4706d2740f2a221cd502922b22e522009041d9
Bug detailed description:
-----------------------------
It causes call trace on all platforms with -nightly, -fixes and -queued
kernel.Test on earlier commit, it also has this issue.
Call trace:
[ 200.944162] ------------[ cut here ]------------
[ 200.944258] WARNING: CPU: 7 PID: 4296 at fs/sysfs/group.c:216
device_del+0x39/0x16a()
[ 200.944406] sysfs group ffffffff81af86d0 not found for kobject 'i2c-6'
[ 200.944500] Modules linked in: i915(-) drm_kms_helper drm ipv6 dm_mod
snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi pcspkr serio_raw
i2c_i801 iTCO_wdt iTCO_vendor_support lpc_ich mfd_core snd_hda_codec snd_hwdep
snd_pcm snd_timer snd soundcore battery tpm_infineon tpm_tis tpm wmi
acpi_cpufreq video button [last unloaded: snd_hda_intel]
[ 200.945759] CPU: 7 PID: 4296 Comm: rmmod Tainted: G W
3.14.0-rc5_drm-intel-fixes_0f4706_20140323+ #950
[ 200.945906] Hardware name: ASUS All Series/Z87-EXPERT, BIOS 1008 05/17/2013
[ 200.945998] 0000000000000000 0000000000000009 ffffffff81716b43
ffff880251395be8
[ 200.946256] ffffffff81035052 ffffffff00000001 ffffffff81379b9f
ffffffff00000001
[ 200.946514] ffff880252747c00 0000000000000002 ffff88025269e150
0000000000000000
[ 200.946773] Call Trace:
[ 200.946861] [<ffffffff81716b43>] ? dump_stack+0x41/0x51
[ 200.946950] [<ffffffff81035052>] ? warn_slowpath_common+0x73/0x8b
[ 200.947040] [<ffffffff81379b9f>] ? device_del+0x39/0x16a
[ 200.947128] [<ffffffff81035102>] ? warn_slowpath_fmt+0x45/0x4a
[ 200.947217] [<ffffffff81379b9f>] ? device_del+0x39/0x16a
[ 200.947306] [<ffffffff81379cd9>] ? device_unregister+0x9/0x12
[ 200.947395] [<ffffffff81379d16>] ? device_destroy+0x34/0x3a
[ 200.947485] [<ffffffff816212d6>] ? i2cdev_detach_adapter+0x3e/0x42
[ 200.947574] [<ffffffff8171ef87>] ? notifier_call_chain+0x2e/0x59
[ 200.947665] [<ffffffff8104e49b>] ? __blocking_notifier_call_chain+0x43/0x5d
[ 200.947756] [<ffffffff81379b97>] ? device_del+0x31/0x16a
[ 200.947846] [<ffffffff81379cd9>] ? device_unregister+0x9/0x12
[ 200.947936] [<ffffffff81620d27>] ? i2c_del_adapter+0x190/0x1d6
[ 200.948032] [<ffffffffa02e557a>] ? intel_dp_encoder_destroy+0x1d/0x62
[i915]
[ 200.948126] [<ffffffffa01d220e>] ? drm_mode_config_cleanup+0x2d/0x216 [drm]
[ 200.948220] [<ffffffffa01ceb54>] ? drm_sysfs_connector_remove+0x74/0x80
[drm]
[ 200.948364] [<ffffffffa02daf6f>] ? intel_modeset_cleanup+0xd1/0xe0 [i915]
[ 200.948456] [<ffffffffa02af96c>] ? i915_driver_unload+0xb6/0x2a0 [i915]
[ 200.948548] [<ffffffffa01cc127>] ? drm_dev_unregister+0x21/0x88 [drm]
[ 200.948641] [<ffffffffa01cc8fe>] ? drm_put_dev+0x48/0x51 [drm]
[ 200.948730] [<ffffffff812f8cee>] ? pci_device_remove+0x38/0x80
[ 200.948819] [<ffffffff8137c23d>] ? __device_release_driver+0x82/0xdb
[ 200.948910] [<ffffffff8137c914>] ? driver_detach+0x6e/0x9a
[ 200.948998] [<ffffffff8137c0a2>] ? bus_remove_driver+0x60/0x7e
[ 200.949087] [<ffffffff812f8e57>] ? pci_unregister_driver+0x17/0x75
[ 200.949177] [<ffffffffa01cdec9>] ? drm_pci_exit+0x3c/0xa0 [drm]
[ 200.949268] [<ffffffff8107e5c3>] ? SyS_delete_module+0x123/0x199
[ 200.949358] [<ffffffff8171c4b2>] ? page_fault+0x22/0x30
[ 200.949447] [<ffffffff817211a2>] ? system_call_fastpath+0x16/0x1b
[ 200.949536] ---[ end trace 32f16d9b1d6381ab ]---
Reproduce steps:
----------------------------
1. ./drv_module_reload</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
<li>You are on the CC list for the bug.</li>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>