Make sure to release the control interface at disconnect so that the
driver can be unbound without leaking resources (and later rebound).
Fixes: a8f54b7bd132 ("USB: serial: add MaxLinear/Exar USB to Serial driver")
Signed-off-by: Johan Hovold <jo...@kernel.org>
---
drivers/usb/serial/xr_serial.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/usb/serial/xr_serial.c b/drivers/usb/serial/xr_serial.c
index 7be6da6a5cf3..5e110b0c8e71 100644
--- a/drivers/usb/serial/xr_serial.c
+++ b/drivers/usb/serial/xr_serial.c
@@ -564,6 +564,15 @@ static int xr_probe(struct usb_serial *serial, const
struct usb_device_id *id)
return 0;
}
+static void xr_disconnect(struct usb_serial *serial)
+{
+ struct usb_driver *driver = serial->type->usb_driver;
+ struct usb_interface *control_interface;
+
+ control_interface = usb_ifnum_to_if(serial->dev, 0);
+ usb_driver_release_interface(driver, control_interface);
+}
+
static const struct usb_device_id id_table[] = {
{ USB_DEVICE(0x04e2, 0x1410) }, /* XR21V141X */
{ }
@@ -578,6 +587,7 @@ static struct usb_serial_driver xr_device = {
.id_table = id_table,
.num_ports = 1,
.probe = xr_probe,
+ .disconnect = xr_disconnect,
.open = xr_open,
.close = xr_close,
.break_ctl = xr_break_ctl,
--
2.26.2
