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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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9
drivers/net/ethernet/intel/e1000e/netdev.c
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@@ -2939,6 +2939,7 @@ static void e1000_setup_rctl(struct e1000_adapter *adapter)
/* Enable Extended Status in all Receive Descriptors */
rfctl = er32(RFCTL);
rfctl |= E1000_RFCTL_EXTEN;
ew32(RFCTL, rfctl);
/*
* 82571 and greater support packet-split where the protocol
@@ -2964,13 +2965,6 @@ static void e1000_setup_rctl(struct e1000_adapter *adapter)
if (adapter->rx_ps_pages) {
u32 psrctl = 0;
/*
* disable packet split support for IPv6 extension headers,
* because some malformed IPv6 headers can hang the Rx
*/
rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
E1000_RFCTL_NEW_IPV6_EXT_DIS);
/* Enable Packet split descriptors */
rctl |= E1000_RCTL_DTYP_PS;
@@ -3009,7 +3003,6 @@ static void e1000_setup_rctl(struct e1000_adapter *adapter)
*/
}
ew32(RFCTL, rfctl);
ew32(RCTL, rctl);
/* just started the receive unit, no need to restart */
adapter->flags &= ~FLAG_RX_RESTART_NOW;