提交 dfea9c94 编写于 作者: P Peter Chen 提交者: Felipe Balbi

usb: udc: store usb_udc pointer in struct usb_gadget

Instead of iterate to find usb_udc according to usb_gadget, this
way is easier.

Alan Stern suggests this way too:
http://marc.info/?l=linux-usb&m=142168496528894&w=2Acked-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>
上级 7252f1bf
......@@ -128,21 +128,11 @@ EXPORT_SYMBOL_GPL(usb_gadget_giveback_request);
static void usb_gadget_state_work(struct work_struct *work)
{
struct usb_gadget *gadget = work_to_gadget(work);
struct usb_udc *udc = NULL;
mutex_lock(&udc_lock);
list_for_each_entry(udc, &udc_list, list)
if (udc->gadget == gadget)
goto found;
mutex_unlock(&udc_lock);
struct usb_gadget *gadget = work_to_gadget(work);
struct usb_udc *udc = gadget->udc;
return;
found:
mutex_unlock(&udc_lock);
sysfs_notify(&udc->dev.kobj, NULL, "state");
if (udc)
sysfs_notify(&udc->dev.kobj, NULL, "state");
}
void usb_gadget_set_state(struct usb_gadget *gadget,
......@@ -278,6 +268,7 @@ int usb_add_gadget_udc_release(struct device *parent, struct usb_gadget *gadget,
goto err3;
udc->gadget = gadget;
gadget->udc = udc;
mutex_lock(&udc_lock);
list_add_tail(&udc->list, &udc_list);
......@@ -348,21 +339,14 @@ static void usb_gadget_remove_driver(struct usb_udc *udc)
*/
void usb_del_gadget_udc(struct usb_gadget *gadget)
{
struct usb_udc *udc = NULL;
struct usb_udc *udc = gadget->udc;
mutex_lock(&udc_lock);
list_for_each_entry(udc, &udc_list, list)
if (udc->gadget == gadget)
goto found;
dev_err(gadget->dev.parent, "gadget not registered.\n");
mutex_unlock(&udc_lock);
return;
if (!udc)
return;
found:
dev_vdbg(gadget->dev.parent, "unregistering gadget\n");
mutex_lock(&udc_lock);
list_del(&udc->list);
mutex_unlock(&udc_lock);
......
......@@ -474,6 +474,7 @@ struct usb_dcd_config_params {
struct usb_gadget;
struct usb_gadget_driver;
struct usb_udc;
/* the rest of the api to the controller hardware: device operations,
* which don't involve endpoints (or i/o).
......@@ -496,6 +497,7 @@ struct usb_gadget_ops {
/**
* struct usb_gadget - represents a usb slave device
* @work: (internal use) Workqueue to be used for sysfs_notify()
* @udc: struct usb_udc pointer for this gadget
* @ops: Function pointers used to access hardware-specific operations.
* @ep0: Endpoint zero, used when reading or writing responses to
* driver setup() requests
......@@ -545,6 +547,7 @@ struct usb_gadget_ops {
*/
struct usb_gadget {
struct work_struct work;
struct usb_udc *udc;
/* readonly to gadget driver */
const struct usb_gadget_ops *ops;
struct usb_ep *ep0;
......
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