> > When usb_ep_enable on a enabled ep, the configuration of the ep
> probably
> > has changed. In this scenario, the ep configuration in hw should be
> > reprogrammed by udc driver. Hence, it is better to return an error to
> > inform the caller.
> >
> > Signed-off-by: Du, Changbin <changbin...@intel.com>
> > ---
> > include/linux/usb/gadget.h | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
> > index d813bd2..89f9fdd 100644
> > --- a/include/linux/usb/gadget.h
> > +++ b/include/linux/usb/gadget.h
> > @@ -268,7 +268,7 @@ static inline int usb_ep_enable(struct usb_ep *ep)
> > int ret;
> >
> > if (ep->enabled)
> > - return 0;
> > + return -EBUSY;
>
> While at that, can you add a WARN_ON() as well ?
>
> if (WARN_ON(ep->enabled))
> return -EBUSY;
>
> --
> balbi
I will update the patch, thanks.
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