[PATCH v2 3/5] usb: composite: add bind_deactivated flag to usb_function

[Robert Baldyga]

This patch introduces 'bind_deactivated' flag in struct usb_function.
Functions which don't want to be activated automatically after bind should
set this flag, and when they start to be ready to work they should call
usb_function_activate().

When USB function sets 'bind_deactivated' flag, initial deactivation
counter is incremented automatically, so there is no need to call
usb_function_deactivate() in function bind.

Signed-off-by: Robert Baldyga <r.baldyga@xxxxxxxxxxx>
---
 drivers/usb/gadget/composite.c | 6 ++++++
 include/linux/usb/composite.h  | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 9ed77f4..cdb9a5c 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -209,6 +209,12 @@ int usb_add_function(struct usb_configuration *config,
 	function->config = config;
 	list_add_tail(&function->list, &config->functions);
 
+	if (function->bind_deactivated) {
+		value = usb_function_deactivate(function);
+		if (value)
+			goto done;
+	}
+
 	/* REVISIT *require* function->bind? */
 	if (function->bind) {
 		value = function->bind(config, function);
diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index 2511469..1074b89 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -228,6 +228,8 @@ struct usb_function {
 	struct list_head		list;
 	DECLARE_BITMAP(endpoints, 32);
 	const struct usb_function_instance *fi;
+
+	unsigned int		bind_deactivated:1;
 };
 
 int usb_add_function(struct usb_configuration *, struct usb_function *);
-- 
1.9.1

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