[PATCH v2 11/22] usb: gadget: ether: init usb_otg_descriptor via usb_otg_descriptor_add

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




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/ether.c | 32 ++++++++++++++++++--------------
 1 file changed, 18 insertions(+), 14 deletions(-)

diff --git a/drivers/usb/gadget/legacy/ether.c b/drivers/usb/gadget/legacy/ether.c
index a3323dc..b9eebe3 100644
--- a/drivers/usb/gadget/legacy/ether.c
+++ b/drivers/usb/gadget/legacy/ether.c
@@ -171,20 +171,7 @@ static struct usb_device_descriptor device_desc = {
 	.bNumConfigurations =	1,
 };
 
-static struct usb_otg_descriptor otg_descriptor = {
-	.bLength =		sizeof 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,
-};
-
-static const struct usb_descriptor_header *otg_desc[] = {
-	(struct usb_descriptor_header *) &otg_descriptor,
-	NULL,
-};
+static const struct usb_descriptor_header *otg_desc[2];
 
 static struct usb_string strings_dev[] = {
 	[USB_GADGET_MANUFACTURER_IDX].s = "",
@@ -229,6 +216,13 @@ static int rndis_do_config(struct usb_configuration *c)
 	/* FIXME alloc iConfiguration string, set it in c->strings */
 
 	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;
 	}
@@ -271,6 +265,13 @@ static int eth_do_config(struct usb_configuration *c)
 	/* FIXME alloc iConfiguration string, set it in c->strings */
 
 	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;
 	}
@@ -463,6 +464,9 @@ static int eth_unbind(struct usb_composite_dev *cdev)
 		usb_put_function(f_geth);
 		usb_put_function_instance(fi_geth);
 	}
+	kfree(otg_desc[0]);
+	otg_desc[0] = NULL;
+
 	return 0;
 }
 
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]
  Powered by Linux