r8169: fix past rtl_chip_info array size for unknown chipsets

'i' is unsigned.
Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Acked-by: Francois Romieu <romieu@fr.zoreil.com>

drivers/net/r8169.c

@@ -1705,18 +1705,18 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	rtl8169_print_mac_version(tp);
 
-	for (i = ARRAY_SIZE(rtl_chip_info) - 1; i >= 0; i--) {
+	for (i = 0; i < ARRAY_SIZE(rtl_chip_info); i++) {
 		if (tp->mac_version == rtl_chip_info[i].mac_version)
 			break;
 	}
-	if (i < 0) {
+	if (i == ARRAY_SIZE(rtl_chip_info)) {
 		/* Unknown chip: assume array element #0, original RTL-8169 */
 		if (netif_msg_probe(tp)) {
 			dev_printk(KERN_DEBUG, &pdev->dev,
 				"unknown chip version, assuming %s\n",
 				rtl_chip_info[0].name);
 		}
-		i++;
+		i = 0;
 	}
 	tp->chipset = i;