[Intel-gfx] [PATCH] drm/i915: Suppress hotplug work during PM suspend/resume

Chris Wilson chris at chris-wilson.co.uk
Thu Apr 19 18:22:47 CEST 2012

On Thu, 19 Apr 2012 18:10:18 +0200, Takashi Iwai <tiwai at suse.de> wrote:
> The hotplug work can be still kicked off via irq during PM, and this
> may conflict with the resume procedure.  For example, eDP on SNB
> machine shows WARNING like below during the resume:

Daniel and I were just discussing the number of work queues we have
active across suspend that like to poke hardware as we either try to
sleep or resume. Since we already have to quiesce the workers to disable
the device, I suggest we reuse the same code for suspend.

Chris Wilson, Intel Open Source Technology Centre

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