This is an internal API, it can be used to find corresponding udc according to usb_gadget_driver.
Signed-off-by: Peter Chen <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
