net: Fix checks on unsigned in w90p910_ether_probe()

index 25e2627..503c2ce 100644
@@ -981,7 +981,7 @@ static int __devinit w90p910_ether_probe(struct platform_device *pdev)
 {
 	struct w90p910_ether *ether;
 	struct net_device *dev;
-	int error;
+	int error, ret;
 
 	dev = alloc_etherdev(sizeof(struct w90p910_ether));
 	if (!dev)

@@ -1010,17 +1010,19 @@ static int __devinit w90p910_ether_probe(struct platform_device *pdev)
 		goto failed_free_mem;
 	}
 
-	ether->txirq = platform_get_irq(pdev, 0);
-	if (ether->txirq < 0) {
+	ret = platform_get_irq(pdev, 0);
+	ether->txirq = ret;
+	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to get ether tx irq\n");
-		error = -ENXIO;
+		error = ret;
 		goto failed_free_io;
 	}
 
-	ether->rxirq = platform_get_irq(pdev, 1);
-	if (ether->rxirq < 0) {
+	ret = platform_get_irq(pdev, 1);
+	ether->rxirq = ret;
+	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to get ether rx irq\n");
-		error = -ENXIO;
+		error = ret;
 		goto failed_free_txirq;
 	}