diff options
| author | Bruce Allan <bruce.w.allan@intel.com> | 2012-03-20 03:48:08 +0000 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2012-05-03 01:55:28 -0700 |
| commit | 7c0427ee76dc96e3f67b90959581d0ba4a38aa63 (patch) | |
| tree | be335493b8e45f276823955a5631632bf05a4a35 | |
| parent | af94bf6db1d58d26f1cdab145b6312ad363254a6 (diff) | |
e1000e: suggest a possible workaround to a device hang on 82577/8
There is a known issue in the 82577 and 82578 device that can cause a hang
in the device hardware during traffic stress; the current workaround in the
driver is to disable transmit flow control by default. If the user enables
transmit flow control and the device hang occurs, provide a message in the
syslog suggesting to re-enable the workaround.
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/netdev.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index c0e211b500c..e86b524a5b1 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -1084,6 +1084,10 @@ static void e1000_print_hw_hang(struct work_struct *work) phy_1000t_status, phy_ext_status, pci_status); + + /* Suggest workaround for known h/w issue */ + if ((hw->mac.type == e1000_pchlan) && (er32(CTRL) & E1000_CTRL_TFCE)) + e_err("Try turning off Tx pause (flow control) via ethtool\n"); } /** |