From c2d5ab4973bfaa72cbb677801825ce56c8f69b56 Mon Sep 17 00:00:00 2001 From: Jesse Brandeburg Date: Thu, 7 May 2009 11:07:35 +0000 Subject: [PATCH] e1000/e1000e/igb/ixgb: don't txhang after link down after the recent changes to wired drivers to use only netif_carrier_off the driver can have outstanding tx work to complete that will never complete once link is down. Since the intel hardware will hold this tx work forever, the driver notices a tx timeout condition internally and might try to instigate printk and reset of the part with a netif_stop_queue, which doesn't work because link is down. Don't bother arming to tx hang detection when link is down. Signed-off-by: Jesse Brandeburg Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/e1000/e1000_main.c | 2 ++ drivers/net/e1000e/netdev.c | 2 ++ drivers/net/igb/igb_main.c | 2 ++ drivers/net/ixgb/ixgb_main.c | 2 ++ 4 files changed, 8 insertions(+) diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c index 71d4fe15976..b455dca0901 100644 --- a/drivers/net/e1000/e1000_main.c +++ b/drivers/net/e1000/e1000_main.c @@ -2646,6 +2646,8 @@ static void e1000_watchdog(unsigned long data) * (Do the reset outside of interrupt context). */ adapter->tx_timeout_count++; schedule_work(&adapter->reset_task); + /* return immediately since reset is imminent */ + return; } } diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c index da6b37e05be..ccaaee0951c 100644 --- a/drivers/net/e1000e/netdev.c +++ b/drivers/net/e1000e/netdev.c @@ -3651,6 +3651,8 @@ link_up: */ adapter->tx_timeout_count++; schedule_work(&adapter->reset_task); + /* return immediately since reset is imminent */ + return; } } diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c index 8de8629b07e..8784c051707 100644 --- a/drivers/net/igb/igb_main.c +++ b/drivers/net/igb/igb_main.c @@ -2711,6 +2711,8 @@ link_up: * (Do the reset outside of interrupt context). */ adapter->tx_timeout_count++; schedule_work(&adapter->reset_task); + /* return immediately since reset is imminent */ + return; } } diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c index cb9ecc48f6d..04cb81a739c 100644 --- a/drivers/net/ixgb/ixgb_main.c +++ b/drivers/net/ixgb/ixgb_main.c @@ -1140,6 +1140,8 @@ ixgb_watchdog(unsigned long data) * to get done, so reset controller to flush Tx. * (Do the reset outside of interrupt context). */ schedule_work(&adapter->tx_timeout_task); + /* return immediately since reset is imminent */ + return; } } -- 2.20.1