[Bug 96214] New: [BAT SKL] WARN Unclaimed register detected (0x65f10) / gem_exec_suspend at basic-s4

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96214

            Bug ID: 96214
           Summary: [BAT SKL] WARN Unclaimed register detected (0x65f10) /
                    gem_exec_suspend at basic-s4
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: tiwai at suse.de
          Reporter: marius.c.vlad at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: chris at chris-wilson.co.uk, imre.deak at intel.com,
                    intel-gfx-bugs at lists.freedesktop.org,
                    ville.syrjala at linux.intel.com
     i915 platform: SKL
     i915 features: display/audio

[  467.894482] [drm] GuC firmware load skipped
[  467.895388] ------------[ cut here ]------------
[  467.895417] WARNING: CPU: 0 PID: 7882 at
drivers/gpu/drm/i915/intel_uncore.c:803 __unclaimed_reg_debug+0x63/0x70 [i915]
[  467.895418] Unclaimed register detected after reading register 0x65f10
[  467.895430] Modules linked in: snd_hda_intel i915 drm_kms_helper drm
snd_hda_codec_hdmi snd_hda_codec_conexant snd_hda_codec_generic snd_hda_codec
intel_rapl snd_hda_core xhci_pci xhci_hcd tpm_crb x86_pkg_temp_thermal
intel_powerclamp i2c_hid tpm_tis tpm rtsx_pci usbcore coretemp hid snd_hwdep
ghash_clmulni_intel mfd_core evdev joydev mei_me serio_raw mei snd_pcm
snd_timer processor video usb_common i2c_algo_bit battery button acpi_pad ac
wmi netconsole psmouse r8169 mii [last unloaded: drm]
[  467.895432] CPU: 0 PID: 7882 Comm: kworker/u16:29 Tainted: G     U         
4.6.0+ #3
[  467.895432] Hardware name: TOSHIBA SATELLITE P50-C/06F4                     
      , BIOS 1.20 10/08/2015
[  467.895435] Workqueue: events_unbound async_run_entry_fn
[  467.895437]  0000000000000086 0000000076c67ed2 ffffffff814c4ec5
ffff880233b9fc50
[  467.895438]  0000000000000000 ffffffff810f8f0e 0000000000065f10
ffff880233b9fca8
[  467.895439]  0000000000000001 0000000000000001 0000000000000000
ffff880067610000
[  467.895439] Call Trace:
[  467.895443]  [<ffffffff814c4ec5>] ? dump_stack+0x5c/0x77
[  467.895444]  [<ffffffff810f8f0e>] ? __warn+0xbe/0xe0
[  467.895445]  [<ffffffff810f8f8f>] ? warn_slowpath_fmt+0x5f/0x80
[  467.895459]  [<ffffffffa035f4f3>] ? __unclaimed_reg_debug+0x63/0x70 [i915]
[  467.895472]  [<ffffffffa0365266>] ? gen9_read32+0x346/0x380 [i915]
[  467.895474]  [<ffffffff8150ef30>] ? pci_pm_suspend_noirq+0x170/0x170
[  467.895487]  [<ffffffffa036b8a3>] ?
i915_audio_component_codec_wake_override+0x33/0xa0 [i915]
[  467.895493]  [<ffffffffa01e28d9>] ? snd_hdac_set_codec_wakeup+0x39/0x90
[snd_hda_core]
[  467.895495]  [<ffffffffa015f82a>] ? hda_intel_init_chip+0x12a/0x180
[snd_hda_intel]
[  467.895497]  [<ffffffffa01600f4>] ? azx_resume+0x94/0x160 [snd_hda_intel]
[  467.895499]  [<ffffffff815f5138>] ? dpm_run_callback+0x48/0x120
[  467.895500]  [<ffffffff815f5572>] ? device_resume+0x82/0x190
[  467.895501]  [<ffffffff815f5699>] ? async_resume+0x19/0x40
[  467.895502]  [<ffffffff81119ea5>] ? async_run_entry_fn+0x45/0x130
[  467.895503]  [<ffffffff811117ed>] ? process_one_work+0x15d/0x410
[  467.895504]  [<ffffffff81111aed>] ? worker_thread+0x4d/0x480
[  467.895505]  [<ffffffff81111aa0>] ? process_one_work+0x410/0x410
[  467.895507]  [<ffffffff8111792d>] ? kthread+0xcd/0xf0
[  467.895509]  [<ffffffff8179bf62>] ? ret_from_fork+0x22/0x40
[  467.895510]  [<ffffffff81117860>] ? kthread_create_on_node+0x190/0x190
[  467.895511] ---[ end trace 9fd67d7ca6273eba ]---


Can be reproduced each time, by running:

$ tests/gem_exec_suspend --run-subtest basic-S4

Happens after the machine returns from suspend. Assigned to Takashi as it seems
to originate in snd.

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