diff --git a/drivers/net/hamradio/6pack.c b/drivers/net/hamradio/6pack.c
index f9e3be96963cde79ded8cd0b556294a6bd9987ec..0b230222bfeab592fa23ec7836accddc79df7a62 100644
--- a/drivers/net/hamradio/6pack.c
+++ b/drivers/net/hamradio/6pack.c
@@ -308,12 +308,6 @@ static int sp_set_mac_address(struct net_device *dev, void *addr)
 {
 	struct sockaddr_ax25 *sa = addr;
 
-	if (sa->sax25_family != AF_AX25)
-		return -EINVAL;
-
-	if (!sa->sax25_ndigis)
-		return -EINVAL;
-
 	spin_lock_irq(&dev->xmit_lock);
 	memcpy(dev->dev_addr, &sa->sax25_call, AX25_ADDR_LEN);
 	spin_unlock_irq(&dev->xmit_lock);
@@ -668,6 +662,9 @@ static int sixpack_open(struct tty_struct *tty)
 	netif_start_queue(dev);
 
 	init_timer(&sp->tx_t);
+	sp->tx_t.function = sp_xmit_on_air;
+	sp->tx_t.data = (unsigned long) sp;
+
 	init_timer(&sp->resync_t);
 
 	spin_unlock_bh(&sp->lock);