net/i40e: fix default PFC setting

To keep consistent with previous release, Priority Flow Control (PFC)
need to be disabled by default. This patch fixes it.

This also fixes an issue where traffic was not forwarded by testpmd
occasionally. In those cases ~4770 pps seen on one of the ports rather
than the full rate (>20mpps).

Fixes: 6f0a707e5b55 ("net/i40e: enable DCB on SRIOV VFs")

Signed-off-by: Jingjing Wu <jingjing.wu@intel.com>
Tested-by: David Hunt <david.hunt@intel.com>

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 6cec8bb..50e037e 100644 (file)
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -10303,8 +10303,6 @@ i40e_dcb_init_configure(struct rte_eth_dev *dev, bool sw_dcb)
                        hw->local_dcbx_config.pfc.willing = 0;
                        hw->local_dcbx_config.pfc.pfccap =
                                                I40E_MAX_TRAFFIC_CLASS;
-                       hw->local_dcbx_config.pfc.pfcenable =
-                                               I40E_DEFAULT_TCMAP;
                        /* FW needs one App to configure HW */
                        hw->local_dcbx_config.numapps = 1;
                        hw->local_dcbx_config.app[0].selector =