USB: wusb: don't leak urb in certain error cases

Don't leak an urb in wusb_dev_alloc() if the following kmalloc() failed.

Reported-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/wusbcore/devconnect.c

@@ -119,20 +119,19 @@ static struct wusb_dev *wusb_dev_alloc(struct wusbhc *wusbhc)
 	urb = usb_alloc_urb(0, GFP_KERNEL);
 	if (urb == NULL)
 		goto err;
+	wusb_dev->set_gtk_urb = urb;
 
-	req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
+	req = kmalloc(sizeof(*req), GFP_KERNEL);
 	if (req == NULL)
 		goto err;
+	wusb_dev->set_gtk_req = req;
 
 	req->bRequestType = USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_DEVICE;
 	req->bRequest = USB_REQ_SET_DESCRIPTOR;
 	req->wValue = cpu_to_le16(USB_DT_KEY << 8 | wusbhc->gtk_index);
 	req->wIndex = 0;
 	req->wLength = cpu_to_le16(wusbhc->gtk.descr.bLength);
 
-	wusb_dev->set_gtk_urb = urb;
-	wusb_dev->set_gtk_req = req;
-
 	return wusb_dev;
 err:
 	wusb_dev_free(wusb_dev);