net/ixgbe: fix link status

[ upstream commit 1ca0583 ]

The link status for 82599eb got from link status register was not
correct, check the enable/disable flag of tx laser when getting the link
status, set the link status down if tx laser disabled since the tx laser
flag could be set correctly when up/down the link status.

Fixes: dc66e5f ("net/ixgbe: improve link state check on VF")

Signed-off-by: Xiao Zhang <xiao.zhang@intel.com>
Reviewed-by: Wei Zhao <wei.zhao1@intel.com>
Acked-by: Xiaolong Ye <xiaolong.ye@intel.com>

drivers/net/ixgbe/ixgbe_ethdev.c

@@ -2943,6 +2943,7 @@ ixgbe_dev_set_link_up(struct rte_eth_dev *dev)
 	} else {
 		/* Turn on the laser */
 		ixgbe_enable_tx_laser(hw);
+		ixgbe_dev_link_update(dev, 0);
 	}
 
 	return 0;
@@ -2973,6 +2974,7 @@ ixgbe_dev_set_link_down(struct rte_eth_dev *dev)
 	} else {
 		/* Turn off the laser */
 		ixgbe_disable_tx_laser(hw);
+		ixgbe_dev_link_update(dev, 0);
 	}
 
 	return 0;
@@ -4086,6 +4088,7 @@ ixgbe_dev_link_update_share(struct rte_eth_dev *dev,
 	int link_up;
 	int diag;
 	int wait = 1;
+	u32 esdp_reg;
 
 	memset(&link, 0, sizeof(link));
 	link.link_status = ETH_LINK_DOWN;
@@ -4113,6 +4116,10 @@ ixgbe_dev_link_update_share(struct rte_eth_dev *dev,
 		return rte_eth_linkstatus_set(dev, &link);
 	}
 
+	esdp_reg = IXGBE_READ_REG(hw, IXGBE_ESDP);
+	if ((esdp_reg & IXGBE_ESDP_SDP3))
+		link_up = 0;
+
 	if (link_up == 0) {
 		if (ixgbe_get_media_type(hw) == ixgbe_media_type_fiber) {
 			intr->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;