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e1000e: Driver workaround for IPv6 Header Extension Erratum.

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Previously, IPv6 extension header parsing was disabled for all devices
supported by e1000e when using packet split mode. However, as per a
silicon errata, only certain devices need this restriction and will need
to disable IPv6 extension header parsing for all modes.

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>
This commit is contained in:
Matthew Vick
2012-04-25 08:01:05 +00:00
committed by Jeff Kirsher
parent 885fe7be4b
commit f6bd5577a3
4 changed files with 26 additions and 8 deletions
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10
drivers/net/ethernet/intel/e1000e/82571.c
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@@ -1279,6 +1279,16 @@ static void e1000_initialize_hw_bits_82571(struct e1000_hw *hw)
ew32(CTRL_EXT, reg);
}
/*
* Disable IPv6 extension header parsing because some malformed
* IPv6 headers can hang the Rx.
*/
if (hw->mac.type <= e1000_82573) {
reg = er32(RFCTL);
reg |= (E1000_RFCTL_IPV6_EX_DIS | E1000_RFCTL_NEW_IPV6_EXT_DIS);
ew32(RFCTL, reg);
}
/* PCI-Ex Control Registers */
switch (hw->mac.type) {
case e1000_82574: