USB: fix memleak in ark3116 serial driver

in an error case memory already allocated must be freed again.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>


diff --git a/drivers/usb/serial/ark3116.c b/drivers/usb/serial/ark3116.c
index ddfee91..fe2bfd6 100644
--- a/drivers/usb/serial/ark3116.c
+++ b/drivers/usb/serial/ark3116.c
@@ -151,8 +151,10 @@
 	return 0;
 
 cleanup:
-	for (--i; i >= 0; --i)
+	for (--i; i >= 0; --i) {
+		kfree(usb_get_serial_port_data(serial->port[i]));
 		usb_set_serial_port_data(serial->port[i], NULL);
+	}
 	return -ENOMEM;
 }