net/i40e: fix Rx hang when disable LLDP

Remove stopping LLDP as a workaround for a known
errata which can cause Rx hang.

Ref: Item #70 from
http://www.intel.com/content/www/us/en/embedded/products/networking/xl710-10-40-controller-spec-update.html

Fixes: 4861cde46116 ("i40e: new poll mode driver")

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Acked-by: Jingjing Wu <jingjing.wu@intel.com>

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index ca515dd..bb81b15 100644 (file)
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -1223,11 +1223,6 @@ eth_i40e_dev_uninit(struct rte_eth_dev *dev)
        dev->rx_pkt_burst = NULL;
        dev->tx_pkt_burst = NULL;
 
-       /* Disable LLDP */
-       ret = i40e_aq_stop_lldp(hw, true, NULL);
-       if (ret != I40E_SUCCESS) /* Its failure can be ignored */
-               PMD_INIT_LOG(INFO, "Failed to stop lldp");
-
        /* Clear PXE mode */
        i40e_clear_pxe_mode(hw);
 
@@ -9432,10 +9427,6 @@ i40e_dcb_init_configure(struct rte_eth_dev *dev, bool sw_dcb)
         * LLDP MIB change event.
         */
        if (sw_dcb == TRUE) {
-               ret = i40e_aq_stop_lldp(hw, TRUE, NULL);
-               if (ret != I40E_SUCCESS)
-                       PMD_INIT_LOG(DEBUG, "Failed to stop lldp");
-
                ret = i40e_init_dcb(hw);
                /* if sw_dcb, lldp agent is stopped, the return from
                 * i40e_init_dcb we expect is failure with I40E_AQ_RC_EPERM