[PATCH 03/26] usb: gadget: epautoconf: add usb_ep_autoconfig_release() function

Robert Baldyga
2015-09-15T14:27:40Z

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>
---
drivers/usb/gadget/epautoconf.c | 17 +++++++++++++++++
include/linux/usb/gadget.h | 2 ++
2 files changed, 19 insertions(+)

diff --git a/drivers/usb/gadget/epautoconf.c b/drivers/usb/gadget/epautoconf.c
index 0f4ece4..30fdab0 100644
--- a/drivers/usb/gadget/epautoconf.c
+++ b/drivers/usb/gadget/epautoconf.c
@@ -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
*
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index c14a69b3..3f299e2 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -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 */
--
1.9.1