usb: dwc2: Disable all EP's on disconnect

Hi Dan,

On 9/20/2018 1:49 PM, Dan Carpenter wrote:

is is obviously deliberate that we drop the other thread's lock and
then take it ourselves.  But I don't think that can be right at all.
How do we know that it's safe for the other thread to drop the lock?

There should at least be a long comment in front of the code explaining
why it's safe to steal the lock like this.

Please review patch version 2: "[PATCH v2] usb: dwc2: Disable all EP's 
on disconnect"
Thanks,
Minas