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

[Ville Syrjälä]

mn Tue, May 16, 2017 at 10:47:48AM +0300, Jani Nikula wrote:
> On Mon, 15 May 2017, Hans de Goede <hdegoede at redhat.com> wrote:
> > Hi,
> >
> > I'm seeing this on suspend/resume on a GPD-win,
> > cherrytrail z8700 device:
> 
> Ville, does
> 
> commit 668e3b014afb66ab29e134bca7c258527273ac75
> Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Date:   Thu Apr 27 19:02:20 2017 +0300
> 
>     drm/i915: Fix runtime PM for LPE audio
> 
> in drm-intel-fixes address this?

ebf5f921478b ("drm/i915: Stop pretending to mask/unmask LPE audio
interrupts") is a more likely candidate.

> 
> BR,
> Jani.
> 
> 
> 
> >
> > [   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
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
> 
> -- 
> Jani Nikula, Intel Open Source Technology Center

-- 
Ville Syrjälä
Intel OTC