On Sat, 2016-03-12 at 20:30 -0800, Greg KH wrote:
> On Sat, Mar 12, 2016 at 07:56:03PM -0800, bruce m beach wrote:
> > I believe I can change the Device descriptors in firmware,
> > upload the new firmware and reboot the stick but wouldn't
> > the usb subsystem have the old device descriptor from the
> > previous hotplug/system boot?
>
> Nope, the kernel reads the descriptor from the device when it is
> connected, you can check this yourself by doing 'lsusb -v' when it is
> plugged in.
>
> > If so then somehow I need to to tell the usb subsystem to re-request
> > the device descriptor. kernel calls are okay. Any thoughts?
>
> No need to do anything in the kernel, all should be fine as long as your
> firmware is correct.
The firmware uploader may need to do a reset though.
Regards
Oliver
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
