[Intel-gfx] New "RPM wakelock ref not held during HW access" in 4.12-rc1 ?

[Hans de Goede]

Hi,

I'm seeing this on suspend/resume on a GPD-win,
cherrytrail z8700 device:

[   75.514651] RPM wakelock ref not held during HW access
[   75.514827] ------------[ cut here ]------------
[   75.515025] WARNING: CPU: 2 PID: 1832 at drivers/gpu/drm/i915/intel_drv.h:1780 fwtable_write32+0x1d3/0x240 [i915]
...
[   75.515704] RIP: 0010:fwtable_write32+0x1d3/0x240 [i915]
...
[   75.515767] Call Trace:
[   75.515952]  lpe_audio_irq_unmask+0x6a/0xc0 [i915]
[   75.515972]  irq_enable+0x3a/0x50
[   75.515984]  __enable_irq+0x34/0x60
[   75.515996]  resume_irqs+0x8f/0xd0
[   75.516007]  resume_device_irqs+0x10/0x20
[   75.516021]  dpm_resume_noirq+0x23e/0x310
[   75.516041]  suspend_devices_and_enter+0x2f3/0x7f0
[   75.516055]  ? finish_wait+0x80/0x80
[   75.516067]  pm_suspend+0x335/0x3a0
[   75.516078]  state_store+0x85/0xf0
[   75.516095]  kobj_attr_store+0xf/0x20
[   75.516108]  sysfs_kf_write+0x37/0x40
[   75.516117]  kernfs_fop_write+0x11c/0x1a0
[   75.516132]  __vfs_write+0x37/0x160
[   75.516145]  ? selinux_file_permission+0xfb/0x120
[   75.516158]  ? security_file_permission+0x3b/0xc0
[   75.516169]  vfs_write+0xb1/0x1a0
[   75.516180]  SyS_write+0x55/0xc0
[   75.516197]  entry_SYSCALL_64_fastpath+0x1a/0xa5
...
[   76.584235] PM: early resume of devices complete after 1067.477 msecs

If someone has a fix for this they want me to try, let me know.

Regards,

Hans