From: Andre Przywara <andre.przywara@arm.com>
Date: Mon, 6 Jul 2020 00:40:32 +0000 (+0100)
Subject: net: sun8i-emac: Bail out on PHY error
X-Git-Tag: v2021.10~469^2~28
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2808cf6c60b5484296651e23066c4b36594f0240;p=platform%2Fkernel%2Fu-boot.git

net: sun8i-emac: Bail out on PHY error

When phy_startup() returns with an error, because there is no link or
the user interrupted the process, we shall stop the _start() routine
and return with an error, instead of proceeding anyway.

This fixes pointless operations when there is no Ethernet cable
connected, for instance.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Tested-by: Amit Singh Tomar <amittomer25@gmail.com> # Pine64+
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
---

diff --git a/drivers/net/sun8i_emac.c b/drivers/net/sun8i_emac.c
index 1dae81c..ddbcf26 100644
--- a/drivers/net/sun8i_emac.c
+++ b/drivers/net/sun8i_emac.c
@@ -435,6 +435,7 @@ static int _sun8i_emac_eth_init(struct emac_eth_dev *priv, u8 *enetaddr)
 {
 	u32 reg, v;
 	int timeout = 100;
+	int ret;
 
 	reg = readl((priv->mac_reg + EMAC_CTL1));
 
@@ -473,7 +474,9 @@ static int _sun8i_emac_eth_init(struct emac_eth_dev *priv, u8 *enetaddr)
 	tx_descs_init(priv);
 
 	/* PHY Start Up */
-	phy_startup(priv->phydev);
+	ret = phy_startup(priv->phydev);
+	if (ret)
+		return ret;
 
 	sun8i_adjust_link(priv, priv->phydev);