[PATCH 01/15] net: sun8i-emac: Bail out on PHY error

[Andre Przywara]

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 at arm.com>
---
 drivers/net/sun8i_emac.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/sun8i_emac.c b/drivers/net/sun8i_emac.c
index e2b05ace8f..d6685e00dc 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);
 
-- 
2.17.5