sunxi: Endless musb_bus_suspend warnings when booting A23 tablet with OTG

[wens Tsai]

Hi Hans,

I've built the latest sunxi-next branches of Linux and U-boot and
tried it on my Q8 A23 tablet. My tablet has an OTG adapter with a
USB ethernet adapter connected all the time. Upon booting into
Linux I get an endless stream of:

    musb_bus_suspend 2586: trying to suspend as a_wait_bcon while active

messages. To get out of this I have to physically remove the OTG
adapter. Booting without the OTG adapter to begin with also gets
rid of the problem.

Have you run into this problem? I wonder if we should disable VBUS
just before leaving U-boot? Now that we support DRIVEVBUS this
shouldn't be a problem.

Regards
ChenYu