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authorAnton Vorontsov <avorontsov@ru.mvista.com>2009-07-08 11:10:56 -0700
committerDavid S. Miller <davem@davemloft.net>2009-07-08 11:10:56 -0700
commitbff38771e1065c7fc3de87e47ba366151eea573c (patch)
tree215ae8b2dc2ec9b6c0d85c9d1048e585df314075 /net/core
parent34701fde8f4bf207ca96d10b8700a8667157854c (diff)
netpoll: Introduce netpoll_carrier_timeout kernel option
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>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/netpoll.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 9675f312830..3afe381e24a 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -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