ISDN: Replace rx_netdev, st_netdev by a single field

For some unknown reason, isdn_net kept two pointers back from the channel
to the associated isdn_net_dev, one is enough, though.

drivers/isdn/i4l/isdn_common.c

@@ -46,8 +46,7 @@ struct isdn_slot {
 	unsigned long     obytes;              /* Statistics outgoing bytes  */
 	struct isdn_v110  iv110;               /* For V.110                  */
 	int               m_idx;               /* Index for mdm....          */
-	isdn_net_dev      *rx_netdev;          /* rx netdev-pointers         */
-	isdn_net_dev      *st_netdev;          /* stat netdev-pointers       */
+	isdn_net_dev      *idev;               /* pointer to isdn_net_dev    */
 };
 
 static struct isdn_slot slot[ISDN_MAX_CHANNELS]; 
@@ -2067,35 +2066,19 @@ isdn_slot_num(int sl)
 }
 
 void
-isdn_slot_set_rx_netdev(int sl, isdn_net_dev *nd)
+isdn_slot_set_idev(int sl, isdn_net_dev *idev)
 {
 	BUG_ON(sl < 0);
 
-	slot[sl].rx_netdev = nd;
+	slot[sl].idev = idev;
 }
 
 isdn_net_dev *
-isdn_slot_rx_netdev(int sl)
+isdn_slot_idev(int sl)
 {
 	BUG_ON(sl < 0);
 
-	return slot[sl].rx_netdev;
-}
-
-void
-isdn_slot_set_st_netdev(int sl, isdn_net_dev *nd)
-{
-	BUG_ON(sl < 0);
-
-	slot[sl].st_netdev = nd;
-}
-
-isdn_net_dev *
-isdn_slot_st_netdev(int sl)
-{
-	BUG_ON(sl < 0);
-
-	return slot[sl].st_netdev;
+	return slot[sl].idev;
 }
 
 int

drivers/isdn/i4l/isdn_common.h

@@ -100,8 +100,6 @@ extern void  isdn_slot_set_usage(int slot, int usage);
 extern char *isdn_slot_num(int slot);
 extern int   isdn_slot_m_idx(int slot);
 extern void  isdn_slot_set_m_idx(int slot, int midx);
-extern void  isdn_slot_set_rx_netdev(int sl, isdn_net_dev *nd);
-extern void  isdn_slot_set_st_netdev(int sl, isdn_net_dev *nd);
-extern isdn_net_dev *isdn_slot_rx_netdev(int sl);
-extern isdn_net_dev *isdn_slot_st_netdev(int sl);
+extern void  isdn_slot_set_idev(int sl, isdn_net_dev *);
+extern isdn_net_dev *isdn_slot_idev(int sl);
 extern int   isdn_hard_header_len(void);

drivers/isdn/i4l/isdn_net.c

@@ -216,8 +216,7 @@ isdn_net_unbind_channel(isdn_net_dev *idev)
 
 	idev->dialstate = ST_NULL;
 
-	isdn_slot_set_rx_netdev(idev->isdn_slot, NULL);
-	isdn_slot_set_st_netdev(idev->isdn_slot, NULL);
+	isdn_slot_set_idev(idev->isdn_slot, NULL);
 	isdn_slot_free(idev->isdn_slot, ISDN_USAGE_NET);
 
 	idev->isdn_slot = -1;
@@ -239,8 +238,7 @@ isdn_net_bind_channel(isdn_net_dev *idev, int idx)
 	cli();
 
 	idev->isdn_slot = idx;
-	isdn_slot_set_rx_netdev(idev->isdn_slot, idev);
-	isdn_slot_set_st_netdev(idev->isdn_slot, idev);
+	isdn_slot_set_idev(idev->isdn_slot, idev);
 
 	if (mlp->ops->bind)
 		retval = mlp->ops->bind(idev);
@@ -296,7 +294,7 @@ static void isdn_net_connected(isdn_net_dev *idev)
 int
 isdn_net_stat_callback(int idx, isdn_ctrl *c)
 {
-	isdn_net_dev *idev = isdn_slot_st_netdev(idx);
+	isdn_net_dev *idev = isdn_slot_idev(idx);
 
 	if (!idev) {
 		HERE;
@@ -547,7 +545,6 @@ isdn_net_event_in_wait_bconn(isdn_net_dev *idev, int pr, void *arg)
 		break;
 	case ISDN_STAT_BCONN:
 		del_timer(&idev->dial_timer);
-		isdn_slot_set_rx_netdev(idev->isdn_slot, idev);
 		isdn_net_connected(idev);
 		return 1;
 	case ISDN_STAT_DHUP:
@@ -939,11 +936,12 @@ isdn_net_receive(isdn_net_dev *idev, struct sk_buff *skb)
 int
 isdn_net_rcv_skb(int idx, struct sk_buff *skb)
 {
-	isdn_net_dev *idev = isdn_slot_rx_netdev(idx);
+	isdn_net_dev *idev = isdn_slot_idev(idx);
 
-	if (!idev)
+	if (!idev) {
+		HERE;
 		return 0;
-
+	}
 	if (!isdn_net_online(idev))
 		return 0;