[PATCH] USB: gadget driver section fixups
This adds __init section annotations to gadget driver bind() routines to
remove calls from .text into .init sections (for endpoint autoconfig).
Likewise it adds __exit section annotations to their unbind() routines.
The specification of the gadget driver register/unregister functions is
updated to explicitly allow use of those sections.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/include/linux/usb_gadget.h b/include/linux/usb_gadget.h
index ff81117..1d78870 100644
--- a/include/linux/usb_gadget.h
+++ b/include/linux/usb_gadget.h
@@ -801,7 +801,9 @@
* Call this in your gadget driver's module initialization function,
* to tell the underlying usb controller driver about your driver.
* The driver's bind() function will be called to bind it to a
- * gadget. This function must be called in a context that can sleep.
+ * gadget before this registration call returns. It's expected that
+ * the bind() functions will be in init sections.
+ * This function must be called in a context that can sleep.
*/
int usb_gadget_register_driver (struct usb_gadget_driver *driver);
@@ -814,7 +816,8 @@
* going away. If the controller is connected to a USB host,
* it will first disconnect(). The driver is also requested
* to unbind() and clean up any device state, before this procedure
- * finally returns.
+ * finally returns. It's expected that the unbind() functions
+ * will in in exit sections, so may not be linked in some kernels.
* This function must be called in a context that can sleep.
*/
int usb_gadget_unregister_driver (struct usb_gadget_driver *driver);