On Wed, 2016-10-05 at 22:41 +0200, Lukas Wunner wrote:
> The PCI core doesn't allow runtime PM by default. Rather it calls
> pm_runtime_forbid() when the device is added (see pci_pm_init(),
> called
> indirectly from pci_device_add()). PCI drivers need to explicitly
> call
> pm_runtime_allow(), typically from their ->probe hook.
>
> If this xHC cannot signal wakeup, it shouldn't allow runtime PM in the
> first place. Simple as that.
Presumably it can generate PME, just not in D0. The XHCI driver
could, albeit with a slight layering violation, check
that specific combination. But why put the code for a potentially
common problem into xhci?
Regards
Oliver
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
