Re: [PATCH 4/8] usb: dwc3: qcom: fix runtime PM wakeup

[Matthias Kaehlcke]

On Tue, Aug 02, 2022 at 05:14:00PM +0200, Johan Hovold wrote:
> A device must enable wakeups during runtime suspend regardless of
> whether it is capable and allowed to wake the system up from system
> suspend.
> 
> Fixes: 2664deb09306 ("usb: dwc3: qcom: Honor wakeup enabled/disabled state")
> Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>

Ah, I wasn't aware that the same wakeup mechanism is used in runtime suspend.

In how far is runtime PM actually supported/used by this driver? The device is
set 'active' in _probe(), and there are no other pm_runtime_* calls, except
in dwc3_qcom_remove() and qcom_dwc3_resume_irq(). How does the device get from
'active' into 'suspended'?