tree d75ed6695fc8ba493fca5918809671973ce46b18
parent d7577b389233a74609841492feaf6a55967aa5c8
author Felipe Balbi <balbi@ti.com> 1412000435 -0500
committer Felipe Balbi <balbi@ti.com> 1413838728 -0500

usb: gadget: function: uvc: make sure to balance ep enable/disable

If a set_alt() to the same alternate setting that's
already selected is received, functions are required
to reset the interface state, this means we must disable
all endpoints and reenable them again.

This is also documented on our kdoc for struct usb_function

* @set_alt: (REQUIRED) Reconfigures altsettings; function drivers may
*	initialize usb_ep.driver data at this time (when it is used).
*	Note that setting an interface to its current altsetting resets
*	interface state, and that all interfaces have a disabled state.

Signed-off-by: Felipe Balbi <balbi@ti.com>