After binding all configurations in gadget, call prep_vendor_descs()
for each function which uses new API and implements this callback.
Signed-off-by: Robert Baldyga <r.baldyga@xxxxxxxxxxx>
---
drivers/usb/gadget/composite.c | 31 +++++++++++++++++++++++++++++++
include/linux/usb/composite.h | 2 ++
2 files changed, 33 insertions(+)
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 324bf81..1b8e204 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -2569,6 +2569,33 @@ int usb_config_do_bind(struct usb_configuration *c)
}
EXPORT_SYMBOL_GPL(usb_config_do_bind);
+/**
+ * composite_prep_vendor_descs - for each function in each configuration call
+ * prep_vendor_descs() callback.
+ * @cdev: composite device
+ */
+int composite_prep_vendor_descs(struct usb_composite_dev *cdev)
+{
+ struct usb_configuration *c;
+ struct usb_function *f;
+ int ret;
+
+ list_for_each_entry(c, &cdev->configs, list)
+ list_for_each_entry(f, &c->functions, list) {
+ if (!usb_function_is_new_api(f))
+ continue;
+ if (f->prep_vendor_descs) {
+ ret = f->prep_vendor_descs(f);
+ if (ret)
+ return ret;
+ }
+
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(composite_prep_vendor_descs);
+
static int composite_bind(struct usb_gadget *gadget,
struct usb_gadget_driver *gdriver)
{
@@ -2598,6 +2625,10 @@ static int composite_bind(struct usb_gadget *gadget,
if (status < 0)
goto fail;
+ status = composite_prep_vendor_descs(cdev);
+ if (status < 0)
+ goto fail;
+
if (cdev->use_os_string) {
status = composite_os_desc_req_prepare(cdev, gadget->ep0);
if (status)
diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index a92da38..dc0ac28c 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -592,6 +592,8 @@ extern int composite_os_desc_req_prepare(struct usb_composite_dev *cdev,
struct usb_ep *ep0);
void composite_dev_cleanup(struct usb_composite_dev *cdev);
+int composite_prep_vendor_descs(struct usb_composite_dev *cdev);
+
void composite_free_descs(struct usb_composite_dev *cdev);
void composite_free_vendor_descs(struct usb_composite_dev *cdev);
--
1.9.1
--
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