Subject: e1000: No-delay link detection at interface up
From: Jesse Brandeburg <[EMAIL PROTECTED]>
Currently after an interface up, the link state is detected 2 seconds later
when the first watchdog timer runs. This patch changes that by triggering
the hardware to generate a link-change interrupt from the up() function
instead. This has the result that the link state gets detected immediately
and without races. This has the potential to speed up booting since a normal
distribution boot process waits for a link before DHCP is attempted.
Signed-off-by: Jesse Brandeburg <[EMAIL PROTECTED]>
Signed-off-by: Auke Kok <[EMAIL PROTECTED]>
Signed-off-by: Arjan van de Ven <[EMAIL PROTECTED]>
---
drivers/net/e1000/e1000_main.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
Index: linux-2.6/drivers/net/e1000/e1000_main.c
===================================================================
--- linux-2.6.orig/drivers/net/e1000/e1000_main.c
+++ linux-2.6/drivers/net/e1000/e1000_main.c
@@ -543,7 +543,8 @@ e1000_up(struct e1000_adapter *adapter)
clear_bit(__E1000_DOWN, &adapter->flags);
- mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
+ /* fire a link change interrupt to start the watchdog */
+ E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_LSC);
return 0;
}
-
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