orinoco: Fix walking past the end of the buffer

Fix walking past the end of the bitrate_table array
in the case when the loop counter == BITRATE_TABLE_SIZE.

Reported by: Denis Kirjanov <dkirjanov@kernel.org>
Signed-off-by: NDavid Kilroy <kilroyd@googlemail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/orinoco/hw.c

@@ -762,14 +762,17 @@ int orinoco_hw_get_act_bitrate(struct orinoco_private *priv, int *bitrate)
 	case FIRMWARE_TYPE_INTERSIL: /* Intersil style rate */
 	case FIRMWARE_TYPE_SYMBOL: /* Symbol style rate */
 		for (i = 0; i < BITRATE_TABLE_SIZE; i++)
-			if (bitrate_table[i].intersil_txratectrl == val)
+			if (bitrate_table[i].intersil_txratectrl == val) {
+				*bitrate = bitrate_table[i].bitrate * 100000;
 				break;
+			}
 
-		if (i >= BITRATE_TABLE_SIZE)
+		if (i >= BITRATE_TABLE_SIZE) {
 			printk(KERN_INFO "%s: Unable to determine current bitrate (0x%04hx)\n",
 			       priv->ndev->name, val);
+			err = -EIO;
+		}
 
-		*bitrate = bitrate_table[i].bitrate * 100000;
 		break;
 	default:
 		BUG();

drivers/net/wireless/orinoco/wext.c

@@ -589,8 +589,15 @@ static int orinoco_ioctl_getrate(struct net_device *dev,
 
 	/* If the interface is running we try to find more about the
 	   current mode */
-	if (netif_running(dev))
-		err = orinoco_hw_get_act_bitrate(priv, &bitrate);
+	if (netif_running(dev)) {
+		int act_bitrate;
+		int lerr;
+
+		/* Ignore errors if we can't get the actual bitrate */
+		lerr = orinoco_hw_get_act_bitrate(priv, &act_bitrate);
+		if (!lerr)
+			bitrate = act_bitrate;
+	}
 
 	orinoco_unlock(priv, &flags);