net: mscc: ocelot: check for errors on memory allocation of ports

Do not proceed probing if we couldn't allocate memory for the ports
array, just error out.
Signed-off-by: NVladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: NHoratiu Vultur <horatiu.vultur@microchip.com>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Tested-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/mscc/ocelot_vsc7514.c

@@ -993,6 +993,10 @@ static int mscc_ocelot_probe(struct platform_device *pdev)
 
 	ocelot->ports = devm_kcalloc(&pdev->dev, ocelot->num_phys_ports,
 				     sizeof(struct ocelot_port *), GFP_KERNEL);
+	if (!ocelot->ports) {
+		err = -ENOMEM;
+		goto out_put_ports;
+	}
 
 	ocelot->vcap_is2_keys = vsc7514_vcap_is2_keys;
 	ocelot->vcap_is2_actions = vsc7514_vcap_is2_actions;