1 files changed, 65 insertions, 52 deletions

diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c
index d56788c8397..81e939e90c4 100644
--- a/drivers/tty/hvc/hvcs.c
+++ b/drivers/tty/hvc/hvcs.c
@@ -330,12 +330,12 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp);
 static void hvcs_close(struct tty_struct *tty, struct file *filp);
 static void hvcs_hangup(struct tty_struct * tty);
 
-static int __devinit hvcs_probe(struct vio_dev *dev,
+static int hvcs_probe(struct vio_dev *dev,
 		const struct vio_device_id *id);
-static int __devexit hvcs_remove(struct vio_dev *dev);
+static int hvcs_remove(struct vio_dev *dev);
 static int __init hvcs_module_init(void);
 static void __exit hvcs_module_exit(void);
-static int __devinit hvcs_initialize(void);
+static int hvcs_initialize(void);
 
 #define HVCS_SCHED_READ	0x00000001
 #define HVCS_QUICK_READ	0x00000002
@@ -609,11 +609,11 @@ static int hvcs_io(struct hvcs_struct *hvcsd)
 	/* remove the read masks */
 	hvcsd->todo_mask &= ~(HVCS_READ_MASK);
 
-	if (tty_buffer_request_room(tty, HVCS_BUFF_LEN) >= HVCS_BUFF_LEN) {
+	if (tty_buffer_request_room(&hvcsd->port, HVCS_BUFF_LEN) >= HVCS_BUFF_LEN) {
 		got = hvc_get_chars(unit_address,
 				&buf[0],
 				HVCS_BUFF_LEN);
-		tty_insert_flip_string(tty, buf, got);
+		tty_insert_flip_string(&hvcsd->port, buf, got);
 	}
 
 	/* Give the TTY time to process the data we just sent. */
@@ -623,7 +623,7 @@ static int hvcs_io(struct hvcs_struct *hvcsd)
 	spin_unlock_irqrestore(&hvcsd->lock, flags);
 	/* This is synch because tty->low_latency == 1 */
 	if(got)
-		tty_flip_buffer_push(tty);
+		tty_flip_buffer_push(&hvcsd->port);
 
 	if (!got) {
 		/* Do this _after_ the flip_buffer_push */
@@ -676,7 +676,7 @@ static int khvcsd(void *unused)
 	return 0;
 }
 
-static struct vio_device_id hvcs_driver_table[] __devinitdata= {
+static struct vio_device_id hvcs_driver_table[] = {
 	{"serial-server", "hvterm2"},
 	{ "", "" }
 };
@@ -756,7 +756,7 @@ static int hvcs_get_index(void)
 	return -1;
 }
 
-static int __devinit hvcs_probe(
+static int hvcs_probe(
 	struct vio_dev *dev,
 	const struct vio_device_id *id)
 {
@@ -835,7 +835,7 @@ static int __devinit hvcs_probe(
 	return 0;
 }
 
-static int __devexit hvcs_remove(struct vio_dev *dev)
+static int hvcs_remove(struct vio_dev *dev)
 {
 	struct hvcs_struct *hvcsd = dev_get_drvdata(&dev->dev);
 	unsigned long flags;
@@ -874,24 +874,19 @@ static int __devexit hvcs_remove(struct vio_dev *dev)
 static struct vio_driver hvcs_vio_driver = {
 	.id_table	= hvcs_driver_table,
 	.probe		= hvcs_probe,
-	.remove		= __devexit_p(hvcs_remove),
+	.remove		= hvcs_remove,
 	.name		= hvcs_driver_name,
 };
 
 /* Only called from hvcs_get_pi please */
 static void hvcs_set_pi(struct hvcs_partner_info *pi, struct hvcs_struct *hvcsd)
 {
-	int clclength;
-
 	hvcsd->p_unit_address = pi->unit_address;
 	hvcsd->p_partition_ID  = pi->partition_ID;
-	clclength = strlen(&pi->location_code[0]);
-	if (clclength > HVCS_CLC_LENGTH)
-		clclength = HVCS_CLC_LENGTH;
 
 	/* copy the null-term char too */
-	strncpy(&hvcsd->p_location_code[0],
-			&pi->location_code[0], clclength + 1);
+	strlcpy(&hvcsd->p_location_code[0],
+			&pi->location_code[0], sizeof(hvcsd->p_location_code));
 }
 
 /*
@@ -1102,27 +1097,20 @@ static struct hvcs_struct *hvcs_get_by_index(int index)
 	return NULL;
 }
 
-/*
- * This is invoked via the tty_open interface when a user app connects to the
- * /dev node.
- */
-static int hvcs_open(struct tty_struct *tty, struct file *filp)
+static int hvcs_install(struct tty_driver *driver, struct tty_struct *tty)
 {
 	struct hvcs_struct *hvcsd;
-	int rc, retval = 0;
-	unsigned long flags;
-	unsigned int irq;
 	struct vio_dev *vdev;
-	unsigned long unit_address;
-
-	if (tty->driver_data)
-		goto fast_open;
+	unsigned long unit_address, flags;
+	unsigned int irq;
+	int retval;
 
 	/*
 	 * Is there a vty-server that shares the same index?
 	 * This function increments the kref index.
 	 */
-	if (!(hvcsd = hvcs_get_by_index(tty->index))) {
+	hvcsd = hvcs_get_by_index(tty->index);
+	if (!hvcsd) {
 		printk(KERN_WARNING "HVCS: open failed, no device associated"
 				" with tty->index %d.\n", tty->index);
 		return -ENODEV;
@@ -1130,11 +1118,16 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp)
 
 	spin_lock_irqsave(&hvcsd->lock, flags);
 
-	if (hvcsd->connected == 0)
-		if ((retval = hvcs_partner_connect(hvcsd)))
-			goto error_release;
+	if (hvcsd->connected == 0) {
+		retval = hvcs_partner_connect(hvcsd);
+		if (retval) {
+			spin_unlock_irqrestore(&hvcsd->lock, flags);
+			printk(KERN_WARNING "HVCS: partner connect failed.\n");
+			goto err_put;
+		}
+	}
 
-	hvcsd->port.count = 1;
+	hvcsd->port.count = 0;
 	hvcsd->port.tty = tty;
 	tty->driver_data = hvcsd;
 
@@ -1155,37 +1148,48 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp)
 	 * This must be done outside of the spinlock because it requests irqs
 	 * and will grab the spinlock and free the connection if it fails.
 	 */
-	if (((rc = hvcs_enable_device(hvcsd, unit_address, irq, vdev)))) {
-		tty_port_put(&hvcsd->port);
+	retval = hvcs_enable_device(hvcsd, unit_address, irq, vdev);
+	if (retval) {
 		printk(KERN_WARNING "HVCS: enable device failed.\n");
-		return rc;
+		goto err_put;
 	}
 
-	goto open_success;
+	retval = tty_port_install(&hvcsd->port, driver, tty);
+	if (retval)
+		goto err_irq;
 
-fast_open:
-	hvcsd = tty->driver_data;
+	return 0;
+err_irq:
+	spin_lock_irqsave(&hvcsd->lock, flags);
+	vio_disable_interrupts(hvcsd->vdev);
+	spin_unlock_irqrestore(&hvcsd->lock, flags);
+	free_irq(irq, hvcsd);
+err_put:
+	tty_port_put(&hvcsd->port);
+
+	return retval;
+}
+
+/*
+ * This is invoked via the tty_open interface when a user app connects to the
+ * /dev node.
+ */
+static int hvcs_open(struct tty_struct *tty, struct file *filp)
+{
+	struct hvcs_struct *hvcsd = tty->driver_data;
+	unsigned long flags;
 
 	spin_lock_irqsave(&hvcsd->lock, flags);
-	tty_port_get(&hvcsd->port);
 	hvcsd->port.count++;
 	hvcsd->todo_mask |= HVCS_SCHED_READ;
 	spin_unlock_irqrestore(&hvcsd->lock, flags);
 
-open_success:
 	hvcs_kick();
 
 	printk(KERN_INFO "HVCS: vty-server@%X connection opened.\n",
 		hvcsd->vdev->unit_address );
 
 	return 0;
-
-error_release:
-	spin_unlock_irqrestore(&hvcsd->lock, flags);
-	tty_port_put(&hvcsd->port);
-
-	printk(KERN_WARNING "HVCS: partner connect failed.\n");
-	return retval;
 }
 
 static void hvcs_close(struct tty_struct *tty, struct file *filp)
@@ -1236,7 +1240,6 @@ static void hvcs_close(struct tty_struct *tty, struct file *filp)
 		tty->driver_data = NULL;
 
 		free_irq(irq, hvcsd);
-		tty_port_put(&hvcsd->port);
 		return;
 	} else if (hvcsd->port.count < 0) {
 		printk(KERN_ERR "HVCS: vty-server@%X open_count: %d"
@@ -1245,6 +1248,12 @@ static void hvcs_close(struct tty_struct *tty, struct file *filp)
 	}
 
 	spin_unlock_irqrestore(&hvcsd->lock, flags);
+}
+
+static void hvcs_cleanup(struct tty_struct * tty)
+{
+	struct hvcs_struct *hvcsd = tty->driver_data;
+
 	tty_port_put(&hvcsd->port);
 }
 
@@ -1431,8 +1440,10 @@ static int hvcs_chars_in_buffer(struct tty_struct *tty)
 }
 
 static const struct tty_operations hvcs_ops = {
+	.install = hvcs_install,
 	.open = hvcs_open,
 	.close = hvcs_close,
+	.cleanup = hvcs_cleanup,
 	.hangup = hvcs_hangup,
 	.write = hvcs_write,
 	.write_room = hvcs_write_room,
@@ -1462,7 +1473,7 @@ static void hvcs_free_index_list(void)
 	hvcs_index_count = 0;
 }
 
-static int __devinit hvcs_initialize(void)
+static int hvcs_initialize(void)
 {
 	int rc, num_ttys_to_alloc;
 
@@ -1480,8 +1491,10 @@ static int __devinit hvcs_initialize(void)
 		num_ttys_to_alloc = hvcs_parm_num_devs;
 
 	hvcs_tty_driver = alloc_tty_driver(num_ttys_to_alloc);
-	if (!hvcs_tty_driver)
+	if (!hvcs_tty_driver) {
+		mutex_unlock(&hvcs_init_mutex);
 		return -ENOMEM;
+	}
 
 	if (hvcs_alloc_index_list(num_ttys_to_alloc)) {
 		rc = -ENOMEM;