diff options
Diffstat (limited to 'include/linux/usb')
| -rw-r--r-- | include/linux/usb/gadget.h | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index c7927df15aa..fe79bf64a0e 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -179,6 +179,7 @@ struct usb_ep { const struct usb_ep_ops *ops; struct list_head ep_list; struct usb_ep_caps caps; + bool enabled; unsigned maxpacket:16; unsigned maxpacket_limit:16; unsigned max_streams:16; @@ -230,7 +231,18 @@ static inline void usb_ep_set_maxpacket_limit(struct usb_ep *ep, static inline int usb_ep_enable(struct usb_ep *ep, const struct usb_endpoint_descriptor *desc) { - return ep->ops->enable(ep, desc); + int ret; + + if (ep->enabled) + return 0; + + ret = ep->ops->enable(ep, desc); + if (ret) + return ret; + + ep->enabled = true; + + return 0; } /** @@ -247,7 +259,18 @@ static inline int usb_ep_enable(struct usb_ep *ep, */ static inline int usb_ep_disable(struct usb_ep *ep) { - return ep->ops->disable(ep); + int ret; + + if (!ep->enabled) + return 0; + + ret = ep->ops->disable(ep); + if (ret) + return ret; + + ep->enabled = false; + + return 0; } /** |