TTY: hvsi, add tty_port

And use count from there.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/hvc/hvsi.c

@@ -69,14 +69,14 @@
 #define __ALIGNED__	__attribute__((__aligned__(sizeof(long))))
 
 struct hvsi_struct {
+	struct tty_port port;
 	struct delayed_work writer;
 	struct work_struct handshaker;
 	wait_queue_head_t emptyq; /* woken when outbuf is emptied */
 	wait_queue_head_t stateq; /* woken when HVSI state changes */
 	spinlock_t lock;
 	int index;
 	struct tty_struct *tty;
-	int count;
 	uint8_t throttle_buf[128];
 	uint8_t outbuf[N_OUTBUF]; /* to implement write_room and chars_in_buffer */
 	/* inbuf is for packet reassembly. leave a little room for leftovers. */
@@ -751,7 +751,7 @@ static int hvsi_open(struct tty_struct *tty, struct file *filp)
 
 	spin_lock_irqsave(&hp->lock, flags);
 	hp->tty = tty;
-	hp->count++;
+	hp->port.count++;
 	atomic_set(&hp->seqno, 0);
 	h_vio_signal(hp->vtermno, VIO_IRQ_ENABLE);
 	spin_unlock_irqrestore(&hp->lock, flags);
@@ -808,7 +808,7 @@ static void hvsi_close(struct tty_struct *tty, struct file *filp)
 
 	spin_lock_irqsave(&hp->lock, flags);
 
-	if (--hp->count == 0) {
+	if (--hp->port.count == 0) {
 		hp->tty = NULL;
 		hp->inbuf_end = hp->inbuf; /* discard remaining partial packets */
 
@@ -841,9 +841,9 @@ static void hvsi_close(struct tty_struct *tty, struct file *filp)
 
 			spin_lock_irqsave(&hp->lock, flags);
 		}
-	} else if (hp->count < 0)
+	} else if (hp->port.count < 0)
 		printk(KERN_ERR "hvsi_close %lu: oops, count is %d\n",
-		       hp - hvsi_ports, hp->count);
+		       hp - hvsi_ports, hp->port.count);
 
 	spin_unlock_irqrestore(&hp->lock, flags);
 }
@@ -857,7 +857,7 @@ static void hvsi_hangup(struct tty_struct *tty)
 
 	spin_lock_irqsave(&hp->lock, flags);
 
-	hp->count = 0;
+	hp->port.count = 0;
 	hp->n_outbuf = 0;
 	hp->tty = NULL;
 
@@ -1228,6 +1228,7 @@ static int __init hvsi_console_init(void)
 		init_waitqueue_head(&hp->emptyq);
 		init_waitqueue_head(&hp->stateq);
 		spin_lock_init(&hp->lock);
+		tty_port_init(&hp->port);
 		hp->index = hvsi_count;
 		hp->inbuf_end = hp->inbuf;
 		hp->state = HVSI_CLOSED;