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| author | Anton Vorontsov <avorontsov@ru.mvista.com> | 2009-07-08 11:10:56 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-07-08 11:10:56 -0700 |
| commit | bff38771e1065c7fc3de87e47ba366151eea573c (patch) | |
| tree | 215ae8b2dc2ec9b6c0d85c9d1048e585df314075 | |
| parent | 34701fde8f4bf207ca96d10b8700a8667157854c (diff) | |
| download | linux-bff38771e1065c7fc3de87e47ba366151eea573c.tar.gz linux-bff38771e1065c7fc3de87e47ba366151eea573c.tar.bz2 linux-bff38771e1065c7fc3de87e47ba366151eea573c.zip | |
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>
| -rw-r--r-- | Documentation/kernel-parameters.txt | 5 | ||||
| -rw-r--r-- | net/core/netpoll.c | 6 |
2 files changed, 10 insertions, 1 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index d77fbd8b79ac..9347f4ad4342 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1531,6 +1531,11 @@ and is between 256 and 4096 characters. It is defined in the file symbolic names: lapic and ioapic Example: nmi_watchdog=2 or nmi_watchdog=panic,lapic + netpoll.carrier_timeout= + [NET] Specifies amount of time (in seconds) that + netpoll should wait for a carrier. By default netpoll + waits 4 seconds. + no387 [BUGS=X86-32] Tells the kernel to use the 387 maths emulation library even if a 387 maths coprocessor is present. diff --git a/net/core/netpoll.c b/net/core/netpoll.c index 9675f312830d..3afe381e24a5 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 |