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netpoll: Introduce netpoll_carrier_timeout kernel option

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Some PHYs require longer timeouts for carrier detection, and
auto-negotiation process may take indefinite amount of time.

It may be inconvenient to force longer timeouts for sane PHYs,
so let's introduce a kernel command line option.

Since we're using module_param(), the option also can be
changed in runtime.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Anton Vorontsov
2009-07-08 11:10:56 -07:00
committed by David S. Miller
parent 34701fde8f
commit bff38771e1
2 changed files with 10 additions and 1 deletions
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6
net/core/netpoll.c
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@@ -9,6 +9,7 @@
* Copyright (C) 2002 Red Hat, Inc.
*/
#include <linux/moduleparam.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/string.h>
@@ -50,6 +51,9 @@ static atomic_t trapped;
static void zap_completion_queue(void);
static void arp_reply(struct sk_buff *skb);
static unsigned int carrier_timeout = 4;
module_param(carrier_timeout, uint, 0644);
static void queue_process(struct work_struct *work)
{
struct netpoll_info *npinfo =
@@ -732,7 +736,7 @@ int netpoll_setup(struct netpoll *np)
}
atleast = jiffies + HZ/10;
atmost = jiffies + 4*HZ;
atmost = jiffies + carrier_timeout * HZ;
while (!netif_carrier_ok(ndev)) {
if (time_after(jiffies, atmost)) {
printk(KERN_NOTICE