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usb: gadget: epautoconf: add usb_ep_autoconfig_release() function

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This patch introduces usb_ep_autoconfig_release() function which allows
to release endpoint previously obtained from usb_ep_autoconfig() during
USB function bind.

Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Robert Baldyga 2015-09-16 12:10:41 +02:00 committed by Felipe Balbi
parent 35bfde3687
commit b67f628c84
2 changed files with 19 additions and 0 deletions
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17
drivers/usb/gadget/epautoconf.c
View File

@ -171,6 +171,23 @@ 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

2
include/linux/usb/gadget.h
View File

@ -1233,6 +1233,8 @@ extern struct usb_ep *usb_ep_autoconfig_ss(struct usb_gadget *,
struct usb_endpoint_descriptor *,
struct usb_ss_ep_comp_descriptor *);
extern void usb_ep_autoconfig_release(struct usb_ep *);
extern void usb_ep_autoconfig_reset(struct usb_gadget *);
#endif /* __LINUX_USB_GADGET_H */