On Tue, Feb 23, 2016 at 10:20 PM, Peter Chen <[email protected]> wrote:

> Oh, you said it is called before.
>
> http://www.spinics.net/lists/linux-usb/msg136714.html

Yes, I have enabled runtime pm previously. Sorry for the confusion.

> If you make sure the neither .runtime_suspend at chipidea driver
> nor mxs_phy_suspend at mxs driver are called, it means the USB HUB
> can never be suspended, then the kernel command line is the only way.

Yes, passing 'usbcore.autosuspend=-1' is the only reliable method I see so far.

> Care to test external USB HUB with i.mx28 evk? I would like to know if it
> is the HUB's issue. Afaik, i.mx28 has no such bug when the bus is
> suspended but the PHY is still active.

How do I test this?
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