From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Sat, 4 Mar 2023 10:52:44 +0000 (+0100)
Subject: net: phy: smsc: fix link up detection in forced irq mode
X-Git-Tag: v6.1.21~247
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=324361de111d021d21f0ed64fdc6cc6cb99f02f9;p=platform%2Fkernel%2Flinux-starfive.git

net: phy: smsc: fix link up detection in forced irq mode

[ Upstream commit 58aac3a2ef414fea6d7fdf823ea177744a087d13 ]

Currently link up can't be detected in forced mode if polling
isn't used. Only link up interrupt source we have is aneg
complete which isn't applicable in forced mode. Therefore we
have to use energy-on as link up indicator.

Fixes: 7365494550f6 ("net: phy: smsc: skip ENERGYON interrupt if disabled")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/net/phy/smsc.c b/drivers/net/phy/smsc.c
index ac7481ce2fc1..00d9eff91dcf 100644
--- a/drivers/net/phy/smsc.c
+++ b/drivers/net/phy/smsc.c
@@ -44,7 +44,6 @@ static struct smsc_hw_stat smsc_hw_stats[] = {
 };
 
 struct smsc_phy_priv {
-	u16 intmask;
 	bool energy_enable;
 };
 
@@ -57,7 +56,6 @@ static int smsc_phy_ack_interrupt(struct phy_device *phydev)
 
 static int smsc_phy_config_intr(struct phy_device *phydev)
 {
-	struct smsc_phy_priv *priv = phydev->priv;
 	int rc;
 
 	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
@@ -65,14 +63,9 @@ static int smsc_phy_config_intr(struct phy_device *phydev)
 		if (rc)
 			return rc;
 
-		priv->intmask = MII_LAN83C185_ISF_INT4 | MII_LAN83C185_ISF_INT6;
-		if (priv->energy_enable)
-			priv->intmask |= MII_LAN83C185_ISF_INT7;
-
-		rc = phy_write(phydev, MII_LAN83C185_IM, priv->intmask);
+		rc = phy_write(phydev, MII_LAN83C185_IM,
+			       MII_LAN83C185_ISF_INT_PHYLIB_EVENTS);
 	} else {
-		priv->intmask = 0;
-
 		rc = phy_write(phydev, MII_LAN83C185_IM, 0);
 		if (rc)
 			return rc;
@@ -85,7 +78,6 @@ static int smsc_phy_config_intr(struct phy_device *phydev)
 
 static irqreturn_t smsc_phy_handle_interrupt(struct phy_device *phydev)
 {
-	struct smsc_phy_priv *priv = phydev->priv;
 	int irq_status;
 
 	irq_status = phy_read(phydev, MII_LAN83C185_ISF);
@@ -96,7 +88,7 @@ static irqreturn_t smsc_phy_handle_interrupt(struct phy_device *phydev)
 		return IRQ_NONE;
 	}
 
-	if (!(irq_status & priv->intmask))
+	if (!(irq_status & MII_LAN83C185_ISF_INT_PHYLIB_EVENTS))
 		return IRQ_NONE;
 
 	phy_trigger_machine(phydev);