atm/suni.c: call atm_dev_signal_change() when signal changes.

Propagate changes to upper atm layer.
Signed-off-by: NKarl Hiramoto <karl@hiramoto.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/atm/suni.c

@@ -291,8 +291,9 @@ static int suni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
 
 static void poll_los(struct atm_dev *dev)
 {
-	dev->signal = GET(RSOP_SIS) & SUNI_RSOP_SIS_LOSV ? ATM_PHY_SIG_LOST :
-	  ATM_PHY_SIG_FOUND;
+	atm_dev_signal_change(dev,
+		GET(RSOP_SIS) & SUNI_RSOP_SIS_LOSV ?
+		ATM_PHY_SIG_LOST : ATM_PHY_SIG_FOUND);
 }