ixgbe: fix older devices that do not support IXGBE_MRQC_L3L4TXSWEN

[ Upstream commit 156a67a9065e3339be85f811d1b13b920e50d73b ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 6cdd58d..410d5d3 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -3924,8 +3924,11 @@ static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
                        else
                                mrqc = IXGBE_MRQC_VMDQRSS64EN;
 
-                       /* Enable L3/L4 for Tx Switched packets */
-                       mrqc |= IXGBE_MRQC_L3L4TXSWEN;
+                       /* 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;
                } else {
                        if (tcs > 4)
                                mrqc = IXGBE_MRQC_RTRSS8TCEN;