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e1000e: bad short packets received when jumbos enabled on 82579

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When short packets are received with jumbos enabled on 82579, they can be
interpreted to have a receive address that does not match any configured
address.  This is due to a hardware bug that can be worked around by
reducing the number of IPG octets added when the packet is transferred from
the PHY to the MAC.

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>
This commit is contained in:
Bruce Allan 2011-09-30 08:07:00 +00:00 committed by Jeff Kirsher
parent 0ef4eedc2e
commit b64e9dd5d0
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/intel/e1000e/ich8lan.c
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@ -1578,7 +1578,7 @@ s32 e1000_lv_jumbo_workaround_ich8lan(struct e1000_hw *hw, bool enable)
ret_val = e1e_wphy(hw, PHY_REG(776, 20), data);
if (ret_val)
goto out;
ret_val = e1e_wphy(hw, PHY_REG(776, 23), 0xFE00);
ret_val = e1e_wphy(hw, PHY_REG(776, 23), 0xF100);
if (ret_val)
goto out;
e1e_rphy(hw, HV_PM_CTRL, &data);