Hi,
changbin.du@xxxxxxxxx writes:
> From: "Du, Changbin" <changbin.du@xxxxxxxxx>
>
> 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.du@xxxxxxxxx>
> ---
> 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
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