On Thu, Jan 24, 2013 at 10:45 AM, Chen Peter-B29397
<B29397@xxxxxxxxxxxxx> wrote:
>
> I also agree with no auto suspend occur during the resume signal is active.
Yes, I agree too.
>
> But one think I still can't understand that you add
> usb_autopm_get_interface_no_resume(
> to_usb_interface(hub->intfdev));
> the purpose should be avoid hub's auto-suspend.
>
> But why the hub's suspend still occurs after calling it, see below log?
Please see below comment in the hub_events(), :-)
/* Balance the usb_autopm_get_interface_no_resume() in
* kick_khubd() and allow autosuspend.
*/
Alan mentioned that we may add one pm_runtime_get_noresume()
to avoid root-hub auto-suspend when it is sending ports resuming
signal from remote-wakeup.
Thanks,
--
Ming Lei
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