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Date: Fri, 15 Dec 2006 10:42:34 +0100 From: Arjan van de Ven <arjan@...ux.intel.com> To: netdev@...r.kernel.org Subject: [patch 14/14] e1000: No-delay link detection at interface up Subject: e1000: No-delay link detection at interface up From: Jesse Brandeburg <jesse.brandeburg@...el.com> 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 <jesse.brandeburg@...el.com> Signed-off-by: Auke Kok <auke-jan.h.kok@...el.com> Signed-off-by: Arjan van de Ven <arjan@...ux.intel.com> --- 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; } - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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