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| author | John Fastabend <john.r.fastabend@intel.com> | 2010-04-27 02:13:39 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-04-27 12:53:29 -0700 |
| commit | c0dfb90e5b2d41c907de9b624657a6688541837e (patch) | |
| tree | ce662b4bb4c737c4e398ea98e229784b396ac7f5 | |
| parent | ff846f52935e6c8dfb0c97df7c2c1bf777454684 (diff) | |
| download | kernel_samsung_aries-c0dfb90e5b2d41c907de9b624657a6688541837e.zip kernel_samsung_aries-c0dfb90e5b2d41c907de9b624657a6688541837e.tar.gz kernel_samsung_aries-c0dfb90e5b2d41c907de9b624657a6688541837e.tar.bz2 | |
ixgbe: ixgbe_down needs to stop dev_watchdog
There is a small race between when the tx queues are stopped
and when netif_carrier_off() is called in ixgbe_down. If the
dev_watchdog() timer fires during this time it is possible for
a false tx timeout to occur.
This patch moves the netif_carrier_off() so that it is called before
the tx queues are stopped preventing the dev_watchdog timer from
detecting false tx timeouts. The race is seen occosionally when
FCoE or DCB settings are being configured or changed.
Testing note, running ifconfig up/down will not reproduce this
issue because dev_open/dev_close call dev_deactivate() and then
dev_activate().
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ixgbe/ixgbe_main.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c index fe7e260..5258b3d 100644 --- a/drivers/net/ixgbe/ixgbe_main.c +++ b/drivers/net/ixgbe/ixgbe_main.c @@ -3291,22 +3291,23 @@ void ixgbe_down(struct ixgbe_adapter *adapter) rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL); IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN); - netif_tx_disable(netdev); - IXGBE_WRITE_FLUSH(hw); msleep(10); netif_tx_stop_all_queues(netdev); - ixgbe_irq_disable(adapter); - - ixgbe_napi_disable_all(adapter); - clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state); del_timer_sync(&adapter->sfp_timer); del_timer_sync(&adapter->watchdog_timer); cancel_work_sync(&adapter->watchdog_task); + netif_carrier_off(netdev); + netif_tx_disable(netdev); + + ixgbe_irq_disable(adapter); + + ixgbe_napi_disable_all(adapter); + if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE || adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) cancel_work_sync(&adapter->fdir_reinit_task); @@ -3324,8 +3325,6 @@ void ixgbe_down(struct ixgbe_adapter *adapter) (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) & ~IXGBE_DMATXCTL_TE)); - netif_carrier_off(netdev); - /* clear n-tuple filters that are cached */ ethtool_ntuple_flush(netdev); |