net/igb: fix PHY status if PHY reset is not blocked

When PHY reset is blocked as is the case when BMC is connected via NC-SI
do not set GO_LINKD bit in PHY power management register in dev_stop as
this will disconnect the PHY. Also, in dev_close clear the GO_LINKD
bit only if PHY reset is not blocked

Fixes: 3af34dec0b41 ("igb: force phy power up/down")
Cc: stable@dpdk.org
Signed-off-by: Shweta Choudaha <shweta.choudaha@att.com>
Reviewed-by: Xiaolong Ye <xiaolong.ye@intel.com>

diff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c
index ce7c9e6..53e83d5 100644 (file)
--- a/drivers/net/e1000/igb_ethdev.c
+++ b/drivers/net/e1000/igb_ethdev.c
@@ -1468,8 +1468,9 @@ eth_igb_stop(struct rte_eth_dev *dev)
        igb_pf_reset_hw(hw);
        E1000_WRITE_REG(hw, E1000_WUC, 0);
 
-       /* Set bit for Go Link disconnect */
-       if (hw->mac.type >= e1000_82580) {
+       /* Set bit for Go Link disconnect if PHY reset is not blocked */
+       if (hw->mac.type >= e1000_82580 &&
+           (e1000_check_reset_block(hw) != E1000_BLK_PHY_RESET)) {
                uint32_t phpm_reg;
 
                phpm_reg = E1000_READ_REG(hw, E1000_82580_PHY_POWER_MGMT);
@@ -1544,8 +1545,9 @@ eth_igb_close(struct rte_eth_dev *dev)
        igb_release_manageability(hw);
        igb_hw_control_release(hw);
 
-       /* Clear bit for Go Link disconnect */
-       if (hw->mac.type >= e1000_82580) {
+       /* Clear bit for Go Link disconnect if PHY reset is not blocked */
+       if (hw->mac.type >= e1000_82580 &&
+           (e1000_check_reset_block(hw) != E1000_BLK_PHY_RESET)) {
                uint32_t phpm_reg;
 
                phpm_reg = E1000_READ_REG(hw, E1000_82580_PHY_POWER_MGMT);