RE: [PATCH] usb: gadget: f_ncm: fix wrong usb_ep

[Peter Chen]

> >Would you please share the use case how to reproduce it?
> We checked again and found NCM gadget driver should not have this issue.
> Please ignore this patch.
> 
> However, we still observe similar issue in ECM and RNDIS gadget driver. Take
> ECM as example, if we plug ECM gadget in high-speed host port first. And, the host
> only set interface with alternate setting != 1 (alt != 1 in ecm_set_alt()) for ECM
> gadget. Then, if we unplug gadget from high-speed host port to another super-
> speed host port afterwards, we will see both in_ep->desc and out_ep->desc in ecm-
> >port keep values for high-speed endpoints. Although NCM's implementation is
> similar to ECM in this part, NCM doesn't have same issue as it only does
> config_ep_by_speed() under if alt is 1.

Does your UDC driver call composite_disconnect when disconnect from the host?
It should set all desc to NULL at related function ->disable.

Peter