Use usb_otg_descriptor_add to allocate and initialize usb_otg_descriptor,
free it while composite unbind.
Signed-off-by: Li Jun <jun.li@xxxxxxxxxxxxx>
---
drivers/usb/gadget/legacy/multi.c | 33 ++++++++++++++++++---------------
1 file changed, 18 insertions(+), 15 deletions(-)
diff --git a/drivers/usb/gadget/legacy/multi.c b/drivers/usb/gadget/legacy/multi.c
index b21b51f..f5de51d 100644
--- a/drivers/usb/gadget/legacy/multi.c
+++ b/drivers/usb/gadget/legacy/multi.c
@@ -78,21 +78,7 @@ static struct usb_device_descriptor device_desc = {
.idProduct = cpu_to_le16(MULTI_PRODUCT_NUM),
};
-
-static const struct usb_descriptor_header *otg_desc[] = {
- (struct usb_descriptor_header *) &(struct usb_otg_descriptor){
- .bLength = sizeof(struct usb_otg_descriptor),
- .bDescriptorType = USB_DT_OTG,
-
- /*
- * REVISIT SRP-only hardware is possible, although
- * it would not be called "OTG" ...
- */
- .bmAttributes = USB_OTG_SRP | USB_OTG_HNP,
- },
- NULL,
-};
-
+static const struct usb_descriptor_header *otg_desc[2];
enum {
MULTI_STRING_RNDIS_CONFIG_IDX = USB_GADGET_FIRST_AVAIL_IDX,
@@ -155,6 +141,13 @@ static int rndis_do_config(struct usb_configuration *c)
int ret;
if (gadget_is_otg(c->cdev->gadget)) {
+ if (!otg_desc[0]) {
+ otg_desc[0] = (struct usb_descriptor_header *)
+ usb_otg_descriptor_add(c->cdev->gadget);
+ if (!otg_desc[0])
+ return -ENOMEM;
+ otg_desc[1] = NULL;
+ }
c->descriptors = otg_desc;
c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
}
@@ -243,6 +236,13 @@ static int cdc_do_config(struct usb_configuration *c)
int ret;
if (gadget_is_otg(c->cdev->gadget)) {
+ if (!otg_desc[0]) {
+ otg_desc[0] = (struct usb_descriptor_header *)
+ usb_otg_descriptor_add(c->cdev->gadget);
+ if (!otg_desc[0])
+ return -ENOMEM;
+ otg_desc[1] = NULL;
+ }
c->descriptors = otg_desc;
c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
}
@@ -490,6 +490,9 @@ static int multi_unbind(struct usb_composite_dev *cdev)
usb_put_function(f_ecm);
usb_put_function_instance(fi_ecm);
#endif
+ kfree(otg_desc[0]);
+ otg_desc[0] = NULL;
+
return 0;
}
--
1.9.1
--
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