net: phy: xgmiitorgmii: Check read_status results

We're ignoring the result of the attached phy device's read_status().
Return it so we can detect errors.

Signed-off-by: Brandon Maier <[e-mail]>
Reviewed-by: Andrew Lunn <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/phy/xilinx_gmii2rgmii.c

···
 	struct mii_bus *bus = priv->mdio->bus;
 	int addr = priv->mdio->addr;
 	u16 val = 0;
+	int err;
 
-	priv->phy_drv->read_status(phydev);
+	err = priv->phy_drv->read_status(phydev);
+	if (err < 0)
+		return err;
 
 	val = mdiobus_read(bus, addr, XILINX_GMII2RGMII_REG);
 	val &= ~XILINX_GMII2RGMII_SPEED_MASK;