Commit 156a67a9 authored Jan 28, 2019 by Jeff Kirsher

ixgbe: fix older devices that do not support IXGBE_MRQC_L3L4TXSWEN



The enabling L3/L4 filtering for transmit switched packets for all
devices caused unforeseen issue on older devices when trying to send UDP
traffic in an ordered sequence.  This bit was originally intended for X550
devices, which supported this feature, so limit the scope of this bit to
only X550 devices.

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>

parent ae3b5641

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

+5 −2

Original line number	Original line	Diff line number	Diff line
	@@ -3953,7 +3953,10 @@ static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
	else		else
	mrqc = IXGBE_MRQC_VMDQRSS64EN;		mrqc = IXGBE_MRQC_VMDQRSS64EN;

	/* Enable L3/L4 for Tx Switched packets */		/* Enable L3/L4 for Tx Switched packets only for X550,
			* older devices do not support this feature
			*/
			if (hw->mac.type >= ixgbe_mac_X550)
	mrqc \|= IXGBE_MRQC_L3L4TXSWEN;		mrqc \|= IXGBE_MRQC_L3L4TXSWEN;
	} else {		} else {
	if (tcs > 4)		if (tcs > 4)