USB: serial: remove generic release callback
Remove empty generic release implementation and make the release
callback non-mandatory (like attach, probe and disconnect).
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 569b679..4819fd9 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -137,7 +137,7 @@
if (serial->minor != SERIAL_TTY_NO_MINOR)
return_serial(serial);
- if (serial->attached)
+ if (serial->attached && serial->type->release)
serial->type->release(serial);
/* Now that nothing is using the ports, they can be freed */
@@ -1305,7 +1305,6 @@
set_to_generic_if_null(device, chars_in_buffer);
set_to_generic_if_null(device, read_bulk_callback);
set_to_generic_if_null(device, write_bulk_callback);
- set_to_generic_if_null(device, release);
set_to_generic_if_null(device, process_read_urb);
set_to_generic_if_null(device, prepare_write_buffer);
}