staging: rtl8188eu: check for kzalloc failure

Check for kzalloc failure and directly return from the error patch thus
simplifying the success path.
Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/os_dep/usb_intf.c

@@ -114,13 +114,12 @@ static struct dvobj_priv *usb_dvobj_init(struct usb_interface *usb_intf)
 	mutex_init(&pdvobjpriv->usb_vendor_req_mutex);
 	pdvobjpriv->usb_vendor_req_buf = kzalloc(MAX_USB_IO_CTL_SIZE, GFP_KERNEL);
 
-	if (pdvobjpriv->usb_vendor_req_buf) {
-		usb_get_dev(pusbd);
-	} else {
+	if (!pdvobjpriv->usb_vendor_req_buf) {
 		usb_set_intfdata(usb_intf, NULL);
 		kfree(pdvobjpriv);
-		pdvobjpriv = NULL;
+		return NULL;
 	}
+	usb_get_dev(pusbd);
 
 	return pdvobjpriv;
 }