This is an internal API, it can be used to find corresponding udc
according to usb_gadget_driver.
Signed-off-by: Peter Chen <peter.chen@xxxxxxxxxxxxx>
---
drivers/usb/gadget/udc/udc-core.c | 33 +++++++++++++++++++++++----------
1 file changed, 23 insertions(+), 10 deletions(-)
diff --git a/drivers/usb/gadget/udc/udc-core.c b/drivers/usb/gadget/udc/udc-core.c
index 0156709..7f8dc5b 100644
--- a/drivers/usb/gadget/udc/udc-core.c
+++ b/drivers/usb/gadget/udc/udc-core.c
@@ -70,6 +70,22 @@ found:
return udc;
}
+static struct usb_udc *udc_driver_find_udc(struct usb_gadget_driver *driver)
+{
+ struct usb_udc *udc = NULL;
+
+ mutex_lock(&udc_lock);
+ list_for_each_entry(udc, &udc_list, list)
+ if (udc->driver == driver)
+ goto found;
+ mutex_unlock(&udc_lock);
+
+ return NULL;
+
+found:
+ mutex_unlock(&udc_lock);
+ return udc;
+}
/* ------------------------------------------------------------------------- */
#ifdef CONFIG_HAS_DMA
@@ -469,17 +485,14 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
if (!driver || !driver->unbind)
return -EINVAL;
- mutex_lock(&udc_lock);
- list_for_each_entry(udc, &udc_list, list)
- if (udc->driver == driver) {
- usb_gadget_remove_driver(udc);
- usb_gadget_set_state(udc->gadget,
- USB_STATE_NOTATTACHED);
- ret = 0;
- break;
- }
+ udc = udc_driver_find_udc(driver);
+ if (udc) {
+ usb_gadget_remove_driver(udc);
+ usb_gadget_set_state(udc->gadget,
+ USB_STATE_NOTATTACHED);
+ ret = 0;
+ }
- mutex_unlock(&udc_lock);
return ret;
}
EXPORT_SYMBOL_GPL(usb_gadget_unregister_driver);
--
1.9.1
--
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