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/******************************************************************************
* devinit.c
*
* This is the watchdog timer routines, ripped from sch_generic.c
* Original copyright notice appears below.
*
*/
/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
* Jamal Hadi Salim, <hadi@nortelnetworks.com> 990601
* - Ingress support
*/
#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/bitops.h>
#include <linux/config.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/lib.h>
#include <linux/mm.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/init.h>
static void dev_watchdog(unsigned long arg)
{
struct net_device *dev = (struct net_device *)arg;
spin_lock(&dev->xmit_lock);
if (netif_device_present(dev) &&
netif_running(dev) &&
netif_carrier_ok(dev)) {
if (netif_queue_stopped(dev) &&
(jiffies - dev->trans_start) > dev->watchdog_timeo) {
printk(KERN_INFO "NETDEV WATCHDOG: %s: transmit timed out\n", dev->name);
dev->tx_timeout(dev);
}
if (!mod_timer(&dev->watchdog_timer, jiffies + dev->watchdog_timeo))
dev_hold(dev);
}
spin_unlock(&dev->xmit_lock);
dev_put(dev);
}
static void dev_watchdog_init(struct net_device *dev)
{
init_timer(&dev->watchdog_timer);
dev->watchdog_timer.data = (unsigned long)dev;
dev->watchdog_timer.function = dev_watchdog;
}
void __netdev_watchdog_up(struct net_device *dev)
{
if (dev->tx_timeout) {
if (dev->watchdog_timeo <= 0)
dev->watchdog_timeo = 5*HZ;
if (!mod_timer(&dev->watchdog_timer, jiffies + dev->watchdog_timeo))
dev_hold(dev);
}
}
static void dev_watchdog_up(struct net_device *dev)
{
spin_lock_bh(&dev->xmit_lock);
__netdev_watchdog_up(dev);
spin_unlock_bh(&dev->xmit_lock);
}
static void dev_watchdog_down(struct net_device *dev)
{
spin_lock_bh(&dev->xmit_lock);
if (del_timer(&dev->watchdog_timer))
__dev_put(dev);
spin_unlock_bh(&dev->xmit_lock);
}
void dev_activate(struct net_device *dev)
{
spin_lock_bh(&dev->queue_lock);
dev->trans_start = jiffies;
dev_watchdog_up(dev);
spin_unlock_bh(&dev->queue_lock);
}
void dev_deactivate(struct net_device *dev)
{
dev_watchdog_down(dev);
}
void dev_init_scheduler(struct net_device *dev)
{
dev_watchdog_init(dev);
}
void dev_shutdown(struct net_device *dev)
{
}
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