diff options
| author | Matthew Vick <matthew.vick@intel.com> | 2012-04-14 05:20:32 +0000 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2012-05-17 05:04:21 -0700 |
| commit | 0c02dd983f0971813fcae81672b9533c35a5b2db (patch) | |
| tree | 74c7c3bf1d748f62feb2cf0a0ffcf92cf1378c86 /drivers/net/ethernet/intel/igb/igb_main.c | |
| parent | a3060858c207d944194a30478d30d3e1822e23f3 (diff) | |
| download | lwn-0c02dd983f0971813fcae81672b9533c35a5b2db.tar.gz lwn-0c02dd983f0971813fcae81672b9533c35a5b2db.zip | |
igb: Disable the BMC-to-OS Watchdog Enable bit for DMAC.
Under certain scenarios, it's possible that bursty manageability traffic
over the BMC-to-OS path may overrun the internal manageability receive
buffer causing dropped manageability packets. Clearing this bit prevents
this situation by interrupting coalescing to allow manageability traffic
through.
Signed-off-by: Matthew Vick <matthew.vick@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/igb/igb_main.c')
| -rw-r--r-- | drivers/net/ethernet/intel/igb/igb_main.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 9bbf1a275947..dd3bfe8cd36c 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -7147,6 +7147,9 @@ static void igb_init_dmac(struct igb_adapter *adapter, u32 pba) /* watchdog timer= +-1000 usec in 32usec intervals */ reg |= (1000 >> 5); + + /* Disable BMC-to-OS Watchdog Enable */ + reg &= ~E1000_DMACR_DC_BMC2OSW_EN; wr32(E1000_DMACR, reg); /* |