usb: gadget: udc: core: fix kernel oops with soft-connect

[pandora-kernel.git] / drivers / usb / gadget / udc-core.c

diff --git a/drivers/usb/gadget/udc-core.c b/drivers/usb/gadget/udc-core.c
index d433fdf..087d402 100644 (file)
--- a/drivers/usb/gadget/udc-core.c
+++ b/drivers/usb/gadget/udc-core.c
@@ -358,6 +358,11 @@ static ssize_t usb_udc_softconn_store(struct device *dev,
 {
        struct usb_udc          *udc = container_of(dev, struct usb_udc, dev);
 
+       if (!udc->driver) {
+               dev_err(dev, "soft-connect without a gadget driver\n");
+               return -EOPNOTSUPP;
+       }
+
        if (sysfs_streq(buf, "connect")) {
                if (udc_is_newstyle(udc))
                        usb_gadget_udc_start(udc->gadget, udc->driver);