net: hibmcge: fix the incorrect np_link fail state issue.

In the debugfs file, the driver displays the np_link fail state
based on the HBG_NIC_STATE_NP_LINK_FAIL.

However, HBG_NIC_STATE_NP_LINK_FAIL is cleared in hbg_service_task()
So, this value of np_link fail is always false.

This patch directly reads the related register to display the real state.

Fixes: e030663 ("net: hibmcge: Add support for mac link exception handling feature")
Signed-off-by: Jijie Shao <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: Jijie Shao

drivers/net/ethernet/hisilicon/hibmcge/hbg_debugfs.c

@@ -106,6 +106,7 @@ static int hbg_dbg_nic_state(struct seq_file *s, void *unused)
 {
 	struct net_device *netdev = dev_get_drvdata(s->private);
 	struct hbg_priv *priv = netdev_priv(netdev);
+	bool np_link_fail;
 
 	seq_printf(s, "event handling state: %s\n",
 		   state_str_true_false(priv, HBG_NIC_STATE_EVENT_HANDLING));
@@ -117,8 +118,10 @@ static int hbg_dbg_nic_state(struct seq_file *s, void *unused)
 		   reset_type_str[priv->reset_type]);
 	seq_printf(s, "need reset state: %s\n",
 		   state_str_true_false(priv, HBG_NIC_STATE_NEED_RESET));
-	seq_printf(s, "np_link fail state: %s\n",
-		   state_str_true_false(priv, HBG_NIC_STATE_NP_LINK_FAIL));
+
+	np_link_fail = !hbg_reg_read_field(priv, HBG_REG_AN_NEG_STATE_ADDR,
+					   HBG_REG_AN_NEG_STATE_NP_LINK_OK_B);
+	seq_printf(s, "np_link fail state: %s\n", str_true_false(np_link_fail));
 
 	return 0;
 }