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 (file)
--- 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);