[Bug 97826] New: WARNING: CPU: 0 PID: 39 at /home/kernel/COD/linux/drivers/gpu/drm/i915/intel_pm.c:7866 sandybridge_pcode_write+0x109/0x1f0 [i915]

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97826

            Bug ID: 97826
           Summary: WARNING: CPU: 0 PID: 39 at
                    /home/kernel/COD/linux/drivers/gpu/drm/i915/intel_pm.c
                    :7866 sandybridge_pcode_write+0x109/0x1f0 [i915]
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: caravena at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Open bug: https://bugzilla.kernel.org/show_bug.cgi?id=156621



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 ]---

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