diff options
| author | Mark Rustad <mark.d.rustad@intel.com> | 2014-01-15 06:53:12 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-01-15 06:59:17 +0400 |
| commit | c3049c8f25bc1f43c7b948a4dbaaae84b0483136 (patch) | |
| tree | 1a942ab2736a62e745faa8943848b149e1d4e841 /drivers/net/ethernet/intel | |
| parent | 09f40aeddd77ad07093516b267ae7b4aebcc57bb (diff) | |
| download | linux-c3049c8f25bc1f43c7b948a4dbaaae84b0483136.tar.xz | |
ixbge: Protect ixgbe_down with __IXGBE_DOWN bit
The ixgbe_down function can now prevent multiple executions by
doing test_and_set_bit on __IXGBE_DOWN. This did not work before
introduction of the __IXGBE_REMOVING bit, because of overloading
of __IXGBE_DOWN. Also add smp_mb__before_clear_bit call before
clearing the __IXGBE_DOWN bit.
Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/intel')
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c index bf7d177b9579..44a261943279 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -4573,6 +4573,7 @@ static void ixgbe_up_complete(struct ixgbe_adapter *adapter) if (hw->mac.ops.enable_tx_laser) hw->mac.ops.enable_tx_laser(hw); + smp_mb__before_clear_bit(); clear_bit(__IXGBE_DOWN, &adapter->state); ixgbe_napi_enable_all(adapter); @@ -4784,7 +4785,8 @@ void ixgbe_down(struct ixgbe_adapter *adapter) int i; /* signal that we are down to the interrupt handler */ - set_bit(__IXGBE_DOWN, &adapter->state); + if (test_and_set_bit(__IXGBE_DOWN, &adapter->state)) + return; /* do nothing if already down */ /* disable receives */ rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL); |