staging: unisys: visornic: simplify visornic if statements

Changes the conditional logic by looking for the absence of work
to do, instead of the opposite.
Signed-off-by: David Binder <david.binder@unisys.com>
Reviewed-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/visornic/visornic_main.c

@@ -1000,10 +1000,13 @@ visornic_set_multi(struct net_device *netdev)
 	struct uiscmdrsp *cmdrsp;
 	struct visornic_devdata *devdata = netdev_priv(netdev);
 
-	/* any filtering changes */
-	if (devdata->old_flags != netdev->flags) {
-		if ((netdev->flags & IFF_PROMISC) !=
-		    (devdata->old_flags & IFF_PROMISC)) {
+	if (devdata->old_flags == netdev->flags)
+		return;
+
+	if ((netdev->flags & IFF_PROMISC) ==
+	    (devdata->old_flags & IFF_PROMISC))
+		goto out_save_flags;
+
 	cmdrsp = kmalloc(SIZEOF_CMDRSP, GFP_ATOMIC);
 	if (!cmdrsp)
 		return;
@@ -1016,9 +1019,9 @@ visornic_set_multi(struct net_device *netdev)
 				  IOCHAN_TO_IOPART,
 				  cmdrsp);
 	kfree(cmdrsp);
-		}
+
+out_save_flags:
 	devdata->old_flags = netdev->flags;
-	}
 }
 
 /**