Bug 156621 - WARNING: CPU: 0 PID: 39 at /home/kernel/COD/linux/drivers/gpu/drm/i915/intel_pm.c:7866 sandybridge_pcode_write+0x109/0x1f0 [i915]
Summary: WARNING: CPU: 0 PID: 39 at /home/kernel/COD/linux/drivers/gpu/drm/i915/intel_...
Status: RESOLVED INVALID
Alias: None
Product: Drivers
Classification: Unclassified
Component: Video(Other) (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: drivers_video-other
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-09-12 23:48 UTC by Cristian Aravena Romero
Modified: 2016-09-15 20:12 UTC (History)
0 users

See Also:
Kernel Version: 4.8.0-040800rc6-lowlatency
Subsystem:
Regression: No
Bisected commit-id:

Attachments
dmesg_4.8.0-040800rc6-lowlatency (56.29 KB, text/plain)
2016-09-12 23:48 UTC, Cristian Aravena Romero 		Details
Add an attachment (proposed patch, testcase, etc.)

Description Cristian Aravena Romero 2016-09-12 23:48:09 UTC 
Created attachment 233161 [details]
dmesg_4.8.0-040800rc6-lowlatency

dmesg:

[    3.763041] ------------[ cut here ]------------
[    3.763113] WARNING: CPU: 0 PID: 39 at /home/kernel/COD/linux/drivers/gpu/drm/i915/intel_pm.c:7866 sandybridge_pcode_write+0x109/0x1f0 [i915]
[    3.763131] Missing switch case (16) in gen6_check_mailbox_status
[    3.763133] Modules linked in: sd_mod hid_generic usbhid hid i915 ahci i2c_algo_bit libahci drm_kms_helper libata crc32c_intel syscopyarea sysfillrect sysimgblt psmouse fb_sys_fops ehci_pci ehci_hcd xhci_pci drm xhci_hcd scsi_mod r8169 usbcore mii usb_common fan thermal wmi video fjes button
[    3.763180] CPU: 0 PID: 39 Comm: kworker/0:1 Not tainted 4.8.0-040800rc6-lowlatency #201609121119
[    3.763183] Hardware name: SAMSUNG ELECTRONICS CO., LTD. 530U3C/530U4C/SAMSUNG_NP1234567890, BIOS P14AAJ 04/15/2013
[    3.763233] Workqueue: events intel_gen6_powersave_work [i915]
[    3.763237]  0000000000000286 00000000e6dc840a ffffffffa39472e2 ffff8a0cd0a1fd58
[    3.763245]  0000000000000000 ffffffffa36802ce ffff8a0cc8800000 ffff8a0cd0a1fdb0
[    3.763250]  0000000000000000 ffff8a0cc880a438 ffff8a0cc8808830 ffff8a0cc880a378
[    3.763257] Call Trace:
[    3.763267]  [<ffffffffa39472e2>] ? dump_stack+0x5c/0x7a
[    3.763274]  [<ffffffffa36802ce>] ? __warn+0xbe/0xe0
[    3.763280]  [<ffffffffa368034f>] ? warn_slowpath_fmt+0x5f/0x80
[    3.763327]  [<ffffffffc067f0d9>] ? sandybridge_pcode_write+0x109/0x1f0 [i915]
[    3.763372]  [<ffffffffc0680ac8>] ? intel_gen6_powersave_work+0x2b8/0x1430 [i915]
[    3.763378]  [<ffffffffa36a6651>] ? finish_task_switch+0x71/0x1e0
[    3.763382]  [<ffffffffa369a30b>] ? process_one_work+0x17b/0x4e0
[    3.763386]  [<ffffffffa369a6ba>] ? worker_thread+0x4a/0x460
[    3.763391]  [<ffffffffa3c23c64>] ? __schedule+0x264/0x740
[    3.763395]  [<ffffffffa369a670>] ? process_one_work+0x4e0/0x4e0
[    3.763400]  [<ffffffffa36a03ad>] ? kthread+0xcd/0xf0
[    3.763405]  [<ffffffffa362d751>] ? __switch_to+0x2c1/0x810
[    3.763412]  [<ffffffffa3c28a1f>] ? ret_from_fork+0x1f/0x40
[    3.763417]  [<ffffffffa36a02e0>] ? kthread_worker_fn+0x160/0x160
[    3.763421] ---[ end trace 1474e6eee4d0ebf1 ]---
Comment 1 Jani Nikula 2016-09-15 08:10:38 UTC 
Generrally, please file new drm/i915 bugs at https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel

Anyway, this is fixed upstream, so never mind.
Comment 2 Cristian Aravena Romero 2016-09-15 20:12:10 UTC 
New report:
https://bugs.freedesktop.org/show_bug.cgi?id=97826
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