On Fri, May 13, 2016 at 01:03:27PM +0300, Roger Quadros wrote:
> @@ -530,6 +683,8 @@ void usb_del_gadget_udc(struct usb_gadget *gadget)
> }
> mutex_unlock(&udc_lock);
>
> + mutex_unlock(&udc_lock);
> +
Here, you have one more mutex_unlock.
Peter
> kobject_uevent(&udc->dev.kobj, KOBJ_REMOVE);
> flush_work(&gadget->work);
> device_unregister(&udc->dev);
> @@ -539,6 +694,13 @@ EXPORT_SYMBOL_GPL(usb_del_gadget_udc);
>
> /* -------------------------------------------------------------------------
> */
>
> +struct otg_gadget_ops otg_gadget_intf = {
> + .start = usb_gadget_start,
> + .stop = usb_gadget_stop,
> + .connect_control = usb_gadget_connect_control,
> +};
> +
> +/* udc_lock must be held */
> static int udc_bind_to_driver(struct usb_udc *udc, struct usb_gadget_driver
> *driver)
> {
> int ret;
> @@ -553,12 +715,20 @@ static int udc_bind_to_driver(struct usb_udc *udc,
> struct usb_gadget_driver *dri
> ret = driver->bind(udc->gadget, driver);
> if (ret)
> goto err1;
> - ret = usb_gadget_udc_start(udc);
> - if (ret) {
> - driver->unbind(udc->gadget);
> - goto err1;
> +
> + /* If OTG, the otg core starts the UDC when needed */
> + if (udc->gadget->otg_dev) {
> + mutex_unlock(&udc_lock);
> + usb_otg_register_gadget(udc->gadget, &otg_gadget_intf);
> + mutex_lock(&udc_lock);
> + } else {
> + ret = usb_gadget_udc_start(udc);
> + if (ret) {
> + driver->unbind(udc->gadget);
> + goto err1;
> + }
> + usb_udc_connect_control(udc);
> }
> - usb_udc_connect_control(udc);
>
> kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE);
> return 0;
> @@ -660,9 +830,15 @@ static ssize_t usb_udc_softconn_store(struct device *dev,
> return -EOPNOTSUPP;
> }
>
> + /* In OTG mode we don't support softconnect, but b_bus_req */
> + if (udc->gadget->otg_dev) {
> + dev_err(dev, "soft-connect not supported in OTG mode\n");
> + return -EOPNOTSUPP;
> + }
> +
> if (sysfs_streq(buf, "connect")) {
> usb_gadget_udc_start(udc);
> - usb_gadget_connect(udc->gadget);
> + usb_udc_connect_control(udc);
> } else if (sysfs_streq(buf, "disconnect")) {
> usb_gadget_disconnect(udc->gadget);
> udc->driver->disconnect(udc->gadget);
> diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
> index 3ecfddd..79d654f 100644
> --- a/include/linux/usb/gadget.h
> +++ b/include/linux/usb/gadget.h
> @@ -1162,6 +1162,10 @@ extern int usb_add_gadget_udc(struct device *parent,
> struct usb_gadget *gadget);
> extern void usb_del_gadget_udc(struct usb_gadget *gadget);
> extern char *usb_get_gadget_udc_name(void);
>
> +extern int usb_otg_add_gadget_udc(struct device *parent,
> + struct usb_gadget *gadget,
> + struct device *otg_dev);
> +
> /*-------------------------------------------------------------------------*/
>
> /* utility to simplify dealing with string descriptors */
> --
> 2.7.4
>
> --
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--
Best Regards,
Peter Chen
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