sfc: only schedule asynchronous filter work if needed

Prevent excessive CPU time spent running a workitem with nothing to do.

We avoid any races by keeping the same check in efx_filter_rfs_expire().

Suggested-by: Martin Habets <mhabets@solarflare.com>
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

path: root/drivers/usb/cdns3/cdns3-trace.c

// SPDX-License-Identifier: GPL-2.0
/*
 * USBSS device controller driver Trace Support
 *
 * Copyright (C) 2018-2019 Cadence.
 *
 * Author: Pawel Laszczak <pawell@cadence.com>
 */

#define CREATE_TRACE_POINTS
#include "cdns3-trace.h"