Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit a124339a authored by Don Skidmore's avatar Don Skidmore Committed by Jeff Kirsher
Browse files

ixgbe: fix for 82599 erratum on Header Splitting 



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.

CC: stable@kernel.org
Signed-off-by: default avatarDon Skidmore <donald.c.skidmore@intel.com>
Tested-by: default avatarStephen Ko <stephen.s.ko@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 2c4db944

drivers/net/ixgbe/ixgbe_main.c

+9 −2
Original line number Diff line number Diff line
@@ -3176,10 +3176,17 @@ static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter) 
	u32 mhadd, hlreg0;



	/* Decide whether to use packet split mode or not */

	/* Do not use packet split if we're in SR-IOV Mode */

	if (!adapter->num_vfs)

	/* On by default */

	adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;



	/* Do not use packet split if we're in SR-IOV Mode */

	if (adapter->num_vfs)

		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;