net: abort network initialization if the PHY driver fails

Now that phy_startup() can return an actual error code, check for that error
code and abort network initialization if the PHY fails.

Signed-off-by: Timur Tabi <timur@freescale.com>
Acked-by: Nobuhiro Iwamamatsu <nobuhiro.iwamatsu.yj@renesas.com> (sh_eth part)
Acked-by: Stephan Linz <linz@li-pro.net> (Xilinx part, xilinx_axi_emac and xilinx_ll_temac)
Reviewed-by: Marek Vasut <marex@denx.de> (FEC part)
diff --git a/drivers/net/xilinx_ll_temac.c b/drivers/net/xilinx_ll_temac.c
index 27dafc1..b67153b 100644
--- a/drivers/net/xilinx_ll_temac.c
+++ b/drivers/net/xilinx_ll_temac.c
@@ -232,6 +232,7 @@
 static int ll_temac_init(struct eth_device *dev, bd_t *bis)
 {
 	struct ll_temac *ll_temac = dev->priv;
+	int ret;
 
 	printf("%s: Xilinx XPS LocalLink Tri-Mode Ether MAC #%d at 0x%08X.\n",
 		dev->name, dev->index, dev->iobase);
@@ -240,7 +241,12 @@
 		return -1;
 
 	/* Start up the PHY */
-	phy_startup(ll_temac->phydev);
+	ret = phy_startup(ll_temac->phydev);
+	if (ret) {
+		printf("%s: Could not initialize PHY %s\n",
+		       dev->name, ll_temac->phydev->dev->name);
+		return ret;
+	}
 
 	if (!ll_temac_adjust_link(dev)) {
 		ll_temac_halt(dev);