Each function driver should activate itself at its function driver
when necessary. Most of functions would like to activate them just
after binding, but some may have special requirements for when to
activate themselves, eg, uvc, it needs the app to open video device
first.
We do not need to consider deactivations count when the bind has failed,
since the usb_composite_dev will be reinitialized at calling composite_bind
next time.
Signed-off-by: Peter Chen <peter.chen@xxxxxxxxxxxxx>
---
drivers/usb/gadget/composite.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 770aa5e..64932ab 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -208,6 +208,11 @@ int usb_add_function(struct usb_configuration *config,
function->config = config;
list_add_tail(&function->list, &config->functions);
+ /*
+ * Deactive default, activates itself at each function driver
+ * according to requirement.
+ */
+ usb_function_deactivate(function);
/* REVISIT *require* function->bind? */
if (function->bind) {
--
1.7.9.5
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