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| author | Auke Kok <auke-jan.h.kok@intel.com> | 2006-05-26 09:35:28 -0700 |
|---|---|---|
| committer | Auke Kok <juke-jan.h.kok@intel.com> | 2006-05-26 09:35:28 -0700 |
| commit | e59d16965ca38df91c4d9390d8eb5a62d7739589 (patch) | |
| tree | 430dd5d0174c4a7c566d8f176599b4a1c324c8c7 /drivers/net/ixgb | |
| parent | a24e2513c2d03c9a92739ec6fa7e7208f792881e (diff) | |
| download | linux-e59d16965ca38df91c4d9390d8eb5a62d7739589.tar.gz linux-e59d16965ca38df91c4d9390d8eb5a62d7739589.tar.bz2 linux-e59d16965ca38df91c4d9390d8eb5a62d7739589.zip | |
ixgb: fix smp polling race condition
Moved interrupt masking to before requesting the interrupt from the OS.
Moved interrupt enable to after netif_poll_enable. This fixes a racy
BUG() where polling would be running on another CPU at the same time
that netif_poll_enable would run.
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>
Diffstat (limited to 'drivers/net/ixgb')
| -rw-r--r-- | drivers/net/ixgb/ixgb_main.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c index 0a0c876dcbdd..954894b5308c 100644 --- a/drivers/net/ixgb/ixgb_main.c +++ b/drivers/net/ixgb/ixgb_main.c @@ -247,6 +247,9 @@ ixgb_up(struct ixgb_adapter *adapter) ixgb_configure_rx(adapter); ixgb_alloc_rx_buffers(adapter); + /* disable interrupts and get the hardware into a known state */ + IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff); + #ifdef CONFIG_PCI_MSI { boolean_t pcix = (IXGB_READ_REG(&adapter->hw, STATUS) & @@ -272,9 +275,6 @@ ixgb_up(struct ixgb_adapter *adapter) return err; } - /* disable interrupts and get the hardware into a known state */ - IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff); - if((hw->max_frame_size != max_frame) || (hw->max_frame_size != (IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) { @@ -295,11 +295,12 @@ ixgb_up(struct ixgb_adapter *adapter) } mod_timer(&adapter->watchdog_timer, jiffies); - ixgb_irq_enable(adapter); #ifdef CONFIG_IXGB_NAPI netif_poll_enable(netdev); #endif + ixgb_irq_enable(adapter); + return 0; } |