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USB: serial: xr: fix interface leak at disconnect 

Make sure to release the control interface at disconnect so that the
driver can be unbound without leaking resources (and later rebound).

Fixes: c2d405aa86 ("USB: serial: add MaxLinear/Exar USB to Serial driver")
Signed-off-by: Johan Hovold <johan@kernel.org>
This commit is contained in:
Johan Hovold 2021-01-21 11:29:14 +01:00
parent a38d214880
commit 54c98d9d7b
1 changed files with 10 additions and 0 deletions
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10
drivers/usb/serial/xr_serial.c
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@ -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,