diff options
Diffstat (limited to 'drivers/usb/gadget/epautoconf.c')
| -rw-r--r-- | drivers/usb/gadget/epautoconf.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/drivers/usb/gadget/epautoconf.c b/drivers/usb/gadget/epautoconf.c index 6399c106a3a5..30fdab0ae383 100644 --- a/drivers/usb/gadget/epautoconf.c +++ b/drivers/usb/gadget/epautoconf.c @@ -53,13 +53,13 @@ * the restrictions that may apply. Some combinations of driver * and hardware won't be able to autoconfigure. * - * On success, this returns an un-claimed usb_ep, and modifies the endpoint + * On success, this returns an claimed usb_ep, and modifies the endpoint * descriptor bEndpointAddress. For bulk endpoints, the wMaxPacket value * is initialized as if the endpoint were used at full speed and * the bmAttribute field in the ep companion descriptor is * updated with the assigned number of streams if it is * different from the original value. To prevent the endpoint - * from being returned by a later autoconfig call, claim it by + * from being returned by a later autoconfig call, claims it by * assigning ep->claimed to true. * * On failure, this returns a null endpoint descriptor. @@ -154,10 +154,10 @@ EXPORT_SYMBOL_GPL(usb_ep_autoconfig_ss); * USB controller, and it can't know all the restrictions that may apply. * Some combinations of driver and hardware won't be able to autoconfigure. * - * On success, this returns an un-claimed usb_ep, and modifies the endpoint + * On success, this returns an claimed usb_ep, and modifies the endpoint * descriptor bEndpointAddress. For bulk endpoints, the wMaxPacket value * is initialized as if the endpoint were used at full speed. To prevent - * the endpoint from being returned by a later autoconfig call, claim it + * the endpoint from being returned by a later autoconfig call, claims it * by assigning ep->claimed to true. * * On failure, this returns a null endpoint descriptor. @@ -172,6 +172,23 @@ struct usb_ep *usb_ep_autoconfig( EXPORT_SYMBOL_GPL(usb_ep_autoconfig); /** + * usb_ep_autoconfig_release - releases endpoint and set it to initial state + * @ep: endpoint which should be released + * + * This function can be used during function bind for endpoints obtained + * from usb_ep_autoconfig(). It unclaims endpoint claimed by + * usb_ep_autoconfig() to make it available for other functions. Endpoint + * which was released is no longer invalid and shouldn't be used in + * context of function which released it. + */ +void usb_ep_autoconfig_release(struct usb_ep *ep) +{ + ep->claimed = false; + ep->driver_data = NULL; +} +EXPORT_SYMBOL_GPL(usb_ep_autoconfig_release); + +/** * usb_ep_autoconfig_reset - reset endpoint autoconfig state * @gadget: device for which autoconfig state will be reset * |