[patch 11/29] ixgbe: fix for 82599 erratum on Header Splitting

[Greg KH]

2.6.37-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Don Skidmore <donald.c.skidmore@xxxxxxxxx>

commit a124339ad28389093ed15eca990d39c51c5736cc upstream.

We have found a hardware erratum on 82599 hardware that can lead to
unpredictable behavior when Header Splitting mode is enabled.  So
we are no longer enabling this feature on affected hardware.

Please see the 82599 Specification Update for more information.

Signed-off-by: Don Skidmore <donald.c.skidmore@xxxxxxxxx>
Tested-by: Stephen Ko <stephen.s.ko@xxxxxxxxx>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/net/ixgbe/ixgbe_main.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -2923,6 +2923,10 @@ static void ixgbe_set_rx_buffer_len(stru
 	if (hw->mac.type == ixgbe_mac_82599EB)
 		adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
 
+	/* Disable packet split due to 82599 erratum #45 */
+	if (hw->mac.type == ixgbe_mac_82599EB)
+		adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
+
 	/* Set the RX buffer length according to the mode */
 	if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 		rx_buf_len = IXGBE_RX_HDR_SIZE;


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