net/txgbe: keep link down after device close

[ upstream commit 409a08c34fd20a25dd209438f52cb38ace081b19 ]

When the port is closed, hardware is reset to power on. And
txgbe_dev_stop() is just returned 0 to avoid secondary calls,
so that the link led remains on. Fix this bug by adding to turn
off the copper/laser.

Fixes: e0d876e ("net/txgbe: support device stop and close")

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>

drivers/net/txgbe/txgbe_ethdev.c

@@ -1882,7 +1882,7 @@ txgbe_dev_stop(struct rte_eth_dev *dev)
 	struct txgbe_tm_conf *tm_conf = TXGBE_DEV_TM_CONF(dev);
 
 	if (hw->adapter_stopped)
-		return 0;
+		goto out;
 
 	PMD_INIT_FUNC_TRACE();
 
@@ -1901,14 +1901,6 @@ txgbe_dev_stop(struct rte_eth_dev *dev)
 	for (vf = 0; vfinfo != NULL && vf < pci_dev->max_vfs; vf++)
 		vfinfo[vf].clear_to_send = false;
 
-	if (hw->phy.media_type == txgbe_media_type_copper) {
-		/* Turn off the copper */
-		hw->phy.set_phy_power(hw, false);
-	} else {
-		/* Turn off the laser */
-		hw->mac.disable_tx_laser(hw);
-	}
-
 	txgbe_dev_clear_queues(dev);
 
 	/* Clear stored conf */
@@ -1939,6 +1931,16 @@ txgbe_dev_stop(struct rte_eth_dev *dev)
 	dev->data->dev_started = 0;
 	hw->dev_start = false;
 
+out:
+	/* close phy to prevent reset in dev_close from restarting physical link */
+	if (hw->phy.media_type == txgbe_media_type_copper) {
+		/* Turn off the copper */
+		hw->phy.set_phy_power(hw, false);
+	} else {
+		/* Turn off the laser */
+		hw->mac.disable_tx_laser(hw);
+	}
+
 	return 0;
 }