Merge tag 'tty-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull TTY changes from Greg Kroah-Hartman:
 "As we skipped the merge window for 3.6-rc1 for the tty tree,
  everything is now settled down and working properly, so we are ready
  for 3.7-rc1.  Here's the patchset, it's big, but the large changes are
  removing a firmware file and adding a staging tty driver (it depended
  on the tty core changes, so it's going through this tree instead of
  the staging tree.)

  All of these patches have been in the linux-next tree for a while.

  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"

Fix up more-or-less trivial conflicts in
 - drivers/char/pcmcia/synclink_cs.c:
    tty NULL dereference fix vs tty_port_cts_enabled() helper function
 - drivers/staging/{Kconfig,Makefile}:
    add-add conflict (dgrp driver added close to other staging drivers)
 - drivers/staging/ipack/devices/ipoctal.c:
    "split ipoctal_channel from iopctal" vs "TTY: use tty_port_register_device"

* tag 'tty-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (235 commits)
  tty/serial: Add kgdb_nmi driver
  tty/serial/amba-pl011: Quiesce interrupts in poll_get_char
  tty/serial/amba-pl011: Implement poll_init callback
  tty/serial/core: Introduce poll_init callback
  kdb: Turn KGDB_KDB=n stubs into static inlines
  kdb: Implement disable_nmi command
  kernel/debug: Mask KGDB NMI upon entry
  serial: pl011: handle corruption at high clock speeds
  serial: sccnxp: Make 'default' choice in switch last
  serial: sccnxp: Remove mask termios caps for SW flow control
  serial: sccnxp: Report actual baudrate back to core
  serial: samsung: Add poll_get_char & poll_put_char
  Powerpc 8xx CPM_UART setting MAXIDL register proportionaly to baud rate
  Powerpc 8xx CPM_UART maxidl should not depend on fifo size
  Powerpc 8xx CPM_UART too many interrupts
  Powerpc 8xx CPM_UART desynchronisation
  serial: set correct baud_base for EXSYS EX-41092 Dual 16950
  serial: omap: fix the reciever line error case
  8250: blacklist Winbond CIR port
  8250_pnp: do pnp probe before legacy probe
  ...

5 files changed, 205 insertions, 203 deletions

diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
index 56f182393c4..ccc248791d5 100644
--- a/net/bluetooth/rfcomm/tty.c
+++ b/net/bluetooth/rfcomm/tty.c
@@ -278,8 +278,8 @@ out:
 	if (err < 0)
 		goto free;
 
-	dev->tty_dev = tty_register_device(rfcomm_tty_driver, dev->id, NULL);
-
+	dev->tty_dev = tty_port_register_device(&dev->port, rfcomm_tty_driver,
+			dev->id, NULL);
 	if (IS_ERR(dev->tty_dev)) {
 		err = PTR_ERR(dev->tty_dev);
 		list_del(&dev->list);
@@ -705,9 +705,9 @@ static int rfcomm_tty_open(struct tty_struct *tty, struct file *filp)
 			break;
 		}
 
-		tty_unlock();
+		tty_unlock(tty);
 		schedule();
-		tty_lock();
+		tty_lock(tty);
 	}
 	set_current_state(TASK_RUNNING);
 	remove_wait_queue(&dev->wait, &wait);
@@ -861,7 +861,7 @@ static int rfcomm_tty_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned l
 
 static void rfcomm_tty_set_termios(struct tty_struct *tty, struct ktermios *old)
 {
-	struct ktermios *new = tty->termios;
+	struct ktermios *new = &tty->termios;
 	int old_baud_rate = tty_termios_baud_rate(old);
 	int new_baud_rate = tty_termios_baud_rate(new);
 
diff --git a/net/irda/ircomm/ircomm_param.c b/net/irda/ircomm/ircomm_param.c
index 8b915f3ac3b..30893912835 100644
--- a/net/irda/ircomm/ircomm_param.c
+++ b/net/irda/ircomm/ircomm_param.c
@@ -99,7 +99,6 @@ pi_param_info_t ircomm_param_info = { pi_major_call_table, 3, 0x0f, 4 };
  */
 int ircomm_param_request(struct ircomm_tty_cb *self, __u8 pi, int flush)
 {
-	struct tty_struct *tty;
 	unsigned long flags;
 	struct sk_buff *skb;
 	int count;
@@ -109,10 +108,6 @@ int ircomm_param_request(struct ircomm_tty_cb *self, __u8 pi, int flush)
 	IRDA_ASSERT(self != NULL, return -1;);
 	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
 
-	tty = self->tty;
-	if (!tty)
-		return 0;
-
 	/* Make sure we don't send parameters for raw mode */
 	if (self->service_type == IRCOMM_3_WIRE_RAW)
 		return 0;
diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c
index 6b9d5a0e42f..95a3a7a336b 100644
--- a/net/irda/ircomm/ircomm_tty.c
+++ b/net/irda/ircomm/ircomm_tty.c
@@ -52,6 +52,8 @@
 #include <net/irda/ircomm_tty_attach.h>
 #include <net/irda/ircomm_tty.h>
 
+static int ircomm_tty_install(struct tty_driver *driver,
+		struct tty_struct *tty);
 static int  ircomm_tty_open(struct tty_struct *tty, struct file *filp);
 static void ircomm_tty_close(struct tty_struct * tty, struct file *filp);
 static int  ircomm_tty_write(struct tty_struct * tty,
@@ -82,6 +84,7 @@ static struct tty_driver *driver;
 static hashbin_t *ircomm_tty = NULL;
 
 static const struct tty_operations ops = {
+	.install	 = ircomm_tty_install,
 	.open            = ircomm_tty_open,
 	.close           = ircomm_tty_close,
 	.write           = ircomm_tty_write,
@@ -104,6 +107,35 @@ static const struct tty_operations ops = {
 #endif /* CONFIG_PROC_FS */
 };
 
+static void ircomm_port_raise_dtr_rts(struct tty_port *port, int raise)
+{
+	struct ircomm_tty_cb *self = container_of(port, struct ircomm_tty_cb,
+			port);
+	/*
+	 * Here, we use to lock those two guys, but as ircomm_param_request()
+	 * does it itself, I don't see the point (and I see the deadlock).
+	 * Jean II
+	 */
+	if (raise)
+		self->settings.dte |= IRCOMM_RTS | IRCOMM_DTR;
+	else
+		self->settings.dte &= ~(IRCOMM_RTS | IRCOMM_DTR);
+
+	ircomm_param_request(self, IRCOMM_DTE, TRUE);
+}
+
+static int ircomm_port_carrier_raised(struct tty_port *port)
+{
+	struct ircomm_tty_cb *self = container_of(port, struct ircomm_tty_cb,
+			port);
+	return self->settings.dce & IRCOMM_CD;
+}
+
+static const struct tty_port_operations ircomm_port_ops = {
+	.dtr_rts = ircomm_port_raise_dtr_rts,
+	.carrier_raised = ircomm_port_carrier_raised,
+};
+
 /*
  * Function ircomm_tty_init()
  *
@@ -194,7 +226,7 @@ static int ircomm_tty_startup(struct ircomm_tty_cb *self)
 	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
 
 	/* Check if already open */
-	if (test_and_set_bit(ASYNC_B_INITIALIZED, &self->flags)) {
+	if (test_and_set_bit(ASYNCB_INITIALIZED, &self->port.flags)) {
 		IRDA_DEBUG(2, "%s(), already open so break out!\n", __func__ );
 		return 0;
 	}
@@ -231,7 +263,7 @@ static int ircomm_tty_startup(struct ircomm_tty_cb *self)
 
 	return 0;
 err:
-	clear_bit(ASYNC_B_INITIALIZED, &self->flags);
+	clear_bit(ASYNCB_INITIALIZED, &self->port.flags);
 	return ret;
 }
 
@@ -242,72 +274,62 @@ err:
  *
  */
 static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self,
-				      struct file *filp)
+		struct tty_struct *tty, struct file *filp)
 {
+	struct tty_port *port = &self->port;
 	DECLARE_WAITQUEUE(wait, current);
 	int		retval;
 	int		do_clocal = 0, extra_count = 0;
 	unsigned long	flags;
-	struct tty_struct *tty;
 
 	IRDA_DEBUG(2, "%s()\n", __func__ );
 
-	tty = self->tty;
-
 	/*
 	 * If non-blocking mode is set, or the port is not enabled,
 	 * then make the check up front and then exit.
 	 */
 	if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
 		/* nonblock mode is set or port is not enabled */
-		self->flags |= ASYNC_NORMAL_ACTIVE;
+		port->flags |= ASYNC_NORMAL_ACTIVE;
 		IRDA_DEBUG(1, "%s(), O_NONBLOCK requested!\n", __func__ );
 		return 0;
 	}
 
-	if (tty->termios->c_cflag & CLOCAL) {
+	if (tty->termios.c_cflag & CLOCAL) {
 		IRDA_DEBUG(1, "%s(), doing CLOCAL!\n", __func__ );
 		do_clocal = 1;
 	}
 
 	/* Wait for carrier detect and the line to become
 	 * free (i.e., not in use by the callout).  While we are in
-	 * this loop, self->open_count is dropped by one, so that
+	 * this loop, port->count is dropped by one, so that
 	 * mgsl_close() knows when to free things.  We restore it upon
 	 * exit, either normal or abnormal.
 	 */
 
 	retval = 0;
-	add_wait_queue(&self->open_wait, &wait);
+	add_wait_queue(&port->open_wait, &wait);
 
 	IRDA_DEBUG(2, "%s(%d):block_til_ready before block on %s open_count=%d\n",
-	      __FILE__,__LINE__, tty->driver->name, self->open_count );
+	      __FILE__, __LINE__, tty->driver->name, port->count);
 
-	/* As far as I can see, we protect open_count - Jean II */
-	spin_lock_irqsave(&self->spinlock, flags);
+	spin_lock_irqsave(&port->lock, flags);
 	if (!tty_hung_up_p(filp)) {
 		extra_count = 1;
-		self->open_count--;
+		port->count--;
 	}
-	spin_unlock_irqrestore(&self->spinlock, flags);
-	self->blocked_open++;
+	spin_unlock_irqrestore(&port->lock, flags);
+	port->blocked_open++;
 
 	while (1) {
-		if (tty->termios->c_cflag & CBAUD) {
-			/* Here, we use to lock those two guys, but
-			 * as ircomm_param_request() does it itself,
-			 * I don't see the point (and I see the deadlock).
-			 * Jean II */
-			self->settings.dte |= IRCOMM_RTS + IRCOMM_DTR;
-
-			ircomm_param_request(self, IRCOMM_DTE, TRUE);
-		}
+		if (tty->termios.c_cflag & CBAUD)
+			tty_port_raise_dtr_rts(port);
 
 		current->state = TASK_INTERRUPTIBLE;
 
 		if (tty_hung_up_p(filp) ||
-		    !test_bit(ASYNC_B_INITIALIZED, &self->flags)) {
-			retval = (self->flags & ASYNC_HUP_NOTIFY) ?
+		    !test_bit(ASYNCB_INITIALIZED, &port->flags)) {
+			retval = (port->flags & ASYNC_HUP_NOTIFY) ?
 					-EAGAIN : -ERESTARTSYS;
 			break;
 		}
@@ -317,8 +339,8 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self,
 		 * specified, we cannot return before the IrCOMM link is
 		 * ready
 		 */
-		if (!test_bit(ASYNC_B_CLOSING, &self->flags) &&
-		    (do_clocal || (self->settings.dce & IRCOMM_CD)) &&
+		if (!test_bit(ASYNCB_CLOSING, &port->flags) &&
+		    (do_clocal || tty_port_carrier_raised(port)) &&
 		    self->state == IRCOMM_TTY_READY)
 		{
 			break;
@@ -330,46 +352,36 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self,
 		}
 
 		IRDA_DEBUG(1, "%s(%d):block_til_ready blocking on %s open_count=%d\n",
-		      __FILE__,__LINE__, tty->driver->name, self->open_count );
+		      __FILE__, __LINE__, tty->driver->name, port->count);
 
 		schedule();
 	}
 
 	__set_current_state(TASK_RUNNING);
-	remove_wait_queue(&self->open_wait, &wait);
+	remove_wait_queue(&port->open_wait, &wait);
 
 	if (extra_count) {
 		/* ++ is not atomic, so this should be protected - Jean II */
-		spin_lock_irqsave(&self->spinlock, flags);
-		self->open_count++;
-		spin_unlock_irqrestore(&self->spinlock, flags);
+		spin_lock_irqsave(&port->lock, flags);
+		port->count++;
+		spin_unlock_irqrestore(&port->lock, flags);
 	}
-	self->blocked_open--;
+	port->blocked_open--;
 
 	IRDA_DEBUG(1, "%s(%d):block_til_ready after blocking on %s open_count=%d\n",
-	      __FILE__,__LINE__, tty->driver->name, self->open_count);
+	      __FILE__, __LINE__, tty->driver->name, port->count);
 
 	if (!retval)
-		self->flags |= ASYNC_NORMAL_ACTIVE;
+		port->flags |= ASYNC_NORMAL_ACTIVE;
 
 	return retval;
 }
 
-/*
- * Function ircomm_tty_open (tty, filp)
- *
- *    This routine is called when a particular tty device is opened. This
- *    routine is mandatory; if this routine is not filled in, the attempted
- *    open will fail with ENODEV.
- */
-static int ircomm_tty_open(struct tty_struct *tty, struct file *filp)
+
+static int ircomm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
 {
 	struct ircomm_tty_cb *self;
 	unsigned int line = tty->index;
-	unsigned long	flags;
-	int ret;
-
-	IRDA_DEBUG(2, "%s()\n", __func__ );
 
 	/* Check if instance already exists */
 	self = hashbin_lock_find(ircomm_tty, line, NULL);
@@ -381,6 +393,8 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp)
 			return -ENOMEM;
 		}
 
+		tty_port_init(&self->port);
+		self->port.ops = &ircomm_port_ops;
 		self->magic = IRCOMM_TTY_MAGIC;
 		self->flow = FLOW_STOP;
 
@@ -388,13 +402,9 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp)
 		INIT_WORK(&self->tqueue, ircomm_tty_do_softint);
 		self->max_header_size = IRCOMM_TTY_HDR_UNINITIALISED;
 		self->max_data_size = IRCOMM_TTY_DATA_UNINITIALISED;
-		self->close_delay = 5*HZ/10;
-		self->closing_wait = 30*HZ;
 
 		/* Init some important stuff */
 		init_timer(&self->watchdog_timer);
-		init_waitqueue_head(&self->open_wait);
-		init_waitqueue_head(&self->close_wait);
 		spin_lock_init(&self->spinlock);
 
 		/*
@@ -404,31 +414,48 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp)
 		 *
 		 * Note this is completely usafe and doesn't work properly
 		 */
-		tty->termios->c_iflag = 0;
-		tty->termios->c_oflag = 0;
+		tty->termios.c_iflag = 0;
+		tty->termios.c_oflag = 0;
 
 		/* Insert into hash */
 		hashbin_insert(ircomm_tty, (irda_queue_t *) self, line, NULL);
 	}
-	/* ++ is not atomic, so this should be protected - Jean II */
-	spin_lock_irqsave(&self->spinlock, flags);
-	self->open_count++;
 
-	tty->driver_data = self;
-	self->tty = tty;
-	spin_unlock_irqrestore(&self->spinlock, flags);
+	return tty_port_install(&self->port, driver, tty);
+}
+
+/*
+ * Function ircomm_tty_open (tty, filp)
+ *
+ *    This routine is called when a particular tty device is opened. This
+ *    routine is mandatory; if this routine is not filled in, the attempted
+ *    open will fail with ENODEV.
+ */
+static int ircomm_tty_open(struct tty_struct *tty, struct file *filp)
+{
+	struct ircomm_tty_cb *self = tty->driver_data;
+	unsigned long	flags;
+	int ret;
+
+	IRDA_DEBUG(2, "%s()\n", __func__ );
+
+	/* ++ is not atomic, so this should be protected - Jean II */
+	spin_lock_irqsave(&self->port.lock, flags);
+	self->port.count++;
+	spin_unlock_irqrestore(&self->port.lock, flags);
+	tty_port_tty_set(&self->port, tty);
 
 	IRDA_DEBUG(1, "%s(), %s%d, count = %d\n", __func__ , tty->driver->name,
-		   self->line, self->open_count);
+		   self->line, self->port.count);
 
 	/* Not really used by us, but lets do it anyway */
-	self->tty->low_latency = (self->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+	tty->low_latency = (self->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
 
 	/*
 	 * If the port is the middle of closing, bail out now
 	 */
 	if (tty_hung_up_p(filp) ||
-	    test_bit(ASYNC_B_CLOSING, &self->flags)) {
+	    test_bit(ASYNCB_CLOSING, &self->port.flags)) {
 
 		/* Hm, why are we blocking on ASYNC_CLOSING if we
 		 * do return -EAGAIN/-ERESTARTSYS below anyway?
@@ -438,14 +465,15 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp)
 		 * probably better sleep uninterruptible?
 		 */
 
-		if (wait_event_interruptible(self->close_wait, !test_bit(ASYNC_B_CLOSING, &self->flags))) {
+		if (wait_event_interruptible(self->port.close_wait,
+				!test_bit(ASYNCB_CLOSING, &self->port.flags))) {
 			IRDA_WARNING("%s - got signal while blocking on ASYNC_CLOSING!\n",
 				     __func__);
 			return -ERESTARTSYS;
 		}
 
 #ifdef SERIAL_DO_RESTART
-		return (self->flags & ASYNC_HUP_NOTIFY) ?
+		return (self->port.flags & ASYNC_HUP_NOTIFY) ?
 			-EAGAIN : -ERESTARTSYS;
 #else
 		return -EAGAIN;
@@ -453,7 +481,7 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp)
 	}
 
 	/* Check if this is a "normal" ircomm device, or an irlpt device */
-	if (line < 0x10) {
+	if (self->line < 0x10) {
 		self->service_type = IRCOMM_3_WIRE | IRCOMM_9_WIRE;
 		self->settings.service_type = IRCOMM_9_WIRE; /* 9 wire as default */
 		/* Jan Kiszka -> add DSR/RI -> Conform to IrCOMM spec */
@@ -469,7 +497,7 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp)
 	if (ret)
 		return ret;
 
-	ret = ircomm_tty_block_til_ready(self, filp);
+	ret = ircomm_tty_block_til_ready(self, tty, filp);
 	if (ret) {
 		IRDA_DEBUG(2,
 		      "%s(), returning after block_til_ready with %d\n", __func__ ,
@@ -489,81 +517,22 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp)
 static void ircomm_tty_close(struct tty_struct *tty, struct file *filp)
 {
 	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
-	unsigned long flags;
+	struct tty_port *port = &self->port;
 
 	IRDA_DEBUG(0, "%s()\n", __func__ );
 
 	IRDA_ASSERT(self != NULL, return;);
 	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
 
-	spin_lock_irqsave(&self->spinlock, flags);
-
-	if (tty_hung_up_p(filp)) {
-		spin_unlock_irqrestore(&self->spinlock, flags);
-
-		IRDA_DEBUG(0, "%s(), returning 1\n", __func__ );
-		return;
-	}
-
-	if ((tty->count == 1) && (self->open_count != 1)) {
-		/*
-		 * Uh, oh.  tty->count is 1, which means that the tty
-		 * structure will be freed.  state->count should always
-		 * be one in these conditions.  If it's greater than
-		 * one, we've got real problems, since it means the
-		 * serial port won't be shutdown.
-		 */
-		IRDA_DEBUG(0, "%s(), bad serial port count; "
-			   "tty->count is 1, state->count is %d\n", __func__ ,
-			   self->open_count);
-		self->open_count = 1;
-	}
-
-	if (--self->open_count < 0) {
-		IRDA_ERROR("%s(), bad serial port count for ttys%d: %d\n",
-			   __func__, self->line, self->open_count);
-		self->open_count = 0;
-	}
-	if (self->open_count) {
-		spin_unlock_irqrestore(&self->spinlock, flags);
-
-		IRDA_DEBUG(0, "%s(), open count > 0\n", __func__ );
+	if (tty_port_close_start(port, tty, filp) == 0)
 		return;
-	}
-
-	/* Hum... Should be test_and_set_bit ??? - Jean II */
-	set_bit(ASYNC_B_CLOSING, &self->flags);
-
-	/* We need to unlock here (we were unlocking at the end of this
-	 * function), because tty_wait_until_sent() may schedule.
-	 * I don't know if the rest should be protected somehow,
-	 * so someone should check. - Jean II */
-	spin_unlock_irqrestore(&self->spinlock, flags);
-
-	/*
-	 * Now we wait for the transmit buffer to clear; and we notify
-	 * the line discipline to only process XON/XOFF characters.
-	 */
-	tty->closing = 1;
-	if (self->closing_wait != ASYNC_CLOSING_WAIT_NONE)
-		tty_wait_until_sent_from_close(tty, self->closing_wait);
 
 	ircomm_tty_shutdown(self);
 
 	tty_driver_flush_buffer(tty);
-	tty_ldisc_flush(tty);
-
-	tty->closing = 0;
-	self->tty = NULL;
 
-	if (self->blocked_open) {
-		if (self->close_delay)
-			schedule_timeout_interruptible(self->close_delay);
-		wake_up_interruptible(&self->open_wait);
-	}
-
-	self->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
-	wake_up_interruptible(&self->close_wait);
+	tty_port_close_end(port, tty);
+	tty_port_tty_set(port, NULL);
 }
 
 /*
@@ -606,7 +575,7 @@ static void ircomm_tty_do_softint(struct work_struct *work)
 	if (!self || self->magic != IRCOMM_TTY_MAGIC)
 		return;
 
-	tty = self->tty;
+	tty = tty_port_tty_get(&self->port);
 	if (!tty)
 		return;
 
@@ -627,7 +596,7 @@ static void ircomm_tty_do_softint(struct work_struct *work)
 	}
 
 	if (tty->hw_stopped)
-		return;
+		goto put;
 
 	/* Unlink transmit buffer */
 	spin_lock_irqsave(&self->spinlock, flags);
@@ -646,6 +615,8 @@ static void ircomm_tty_do_softint(struct work_struct *work)
 
 	/* Check if user (still) wants to be waken up */
 	tty_wakeup(tty);
+put:
+	tty_kref_put(tty);
 }
 
 /*
@@ -880,7 +851,7 @@ static void ircomm_tty_throttle(struct tty_struct *tty)
 		ircomm_tty_send_xchar(tty, STOP_CHAR(tty));
 
 	/* Hardware flow control? */
-	if (tty->termios->c_cflag & CRTSCTS) {
+	if (tty->termios.c_cflag & CRTSCTS) {
 		self->settings.dte &= ~IRCOMM_RTS;
 		self->settings.dte |= IRCOMM_DELTA_RTS;
 
@@ -912,7 +883,7 @@ static void ircomm_tty_unthrottle(struct tty_struct *tty)
 	}
 
 	/* Using hardware flow control? */
-	if (tty->termios->c_cflag & CRTSCTS) {
+	if (tty->termios.c_cflag & CRTSCTS) {
 		self->settings.dte |= (IRCOMM_RTS|IRCOMM_DELTA_RTS);
 
 		ircomm_param_request(self, IRCOMM_DTE, TRUE);
@@ -955,7 +926,7 @@ static void ircomm_tty_shutdown(struct ircomm_tty_cb *self)
 
 	IRDA_DEBUG(0, "%s()\n", __func__ );
 
-	if (!test_and_clear_bit(ASYNC_B_INITIALIZED, &self->flags))
+	if (!test_and_clear_bit(ASYNCB_INITIALIZED, &self->port.flags))
 		return;
 
 	ircomm_tty_detach_cable(self);
@@ -994,6 +965,7 @@ static void ircomm_tty_shutdown(struct ircomm_tty_cb *self)
 static void ircomm_tty_hangup(struct tty_struct *tty)
 {
 	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
+	struct tty_port *port = &self->port;
 	unsigned long	flags;
 
 	IRDA_DEBUG(0, "%s()\n", __func__ );
@@ -1004,14 +976,17 @@ static void ircomm_tty_hangup(struct tty_struct *tty)
 	/* ircomm_tty_flush_buffer(tty); */
 	ircomm_tty_shutdown(self);
 
-	/* I guess we need to lock here - Jean II */
-	spin_lock_irqsave(&self->spinlock, flags);
-	self->flags &= ~ASYNC_NORMAL_ACTIVE;
-	self->tty = NULL;
-	self->open_count = 0;
-	spin_unlock_irqrestore(&self->spinlock, flags);
+	spin_lock_irqsave(&port->lock, flags);
+	port->flags &= ~ASYNC_NORMAL_ACTIVE;
+	if (port->tty) {
+		set_bit(TTY_IO_ERROR, &port->tty->flags);
+		tty_kref_put(port->tty);
+	}
+	port->tty = NULL;
+	port->count = 0;
+	spin_unlock_irqrestore(&port->lock, flags);
 
-	wake_up_interruptible(&self->open_wait);
+	wake_up_interruptible(&port->open_wait);
 }
 
 /*
@@ -1071,20 +1046,20 @@ void ircomm_tty_check_modem_status(struct ircomm_tty_cb *self)
 	IRDA_ASSERT(self != NULL, return;);
 	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
 
-	tty = self->tty;
+	tty = tty_port_tty_get(&self->port);
 
 	status = self->settings.dce;
 
 	if (status & IRCOMM_DCE_DELTA_ANY) {
 		/*wake_up_interruptible(&self->delta_msr_wait);*/
 	}
-	if ((self->flags & ASYNC_CHECK_CD) && (status & IRCOMM_DELTA_CD)) {
+	if ((self->port.flags & ASYNC_CHECK_CD) && (status & IRCOMM_DELTA_CD)) {
 		IRDA_DEBUG(2,
 			   "%s(), ircomm%d CD now %s...\n", __func__ , self->line,
 			   (status & IRCOMM_CD) ? "on" : "off");
 
 		if (status & IRCOMM_CD) {
-			wake_up_interruptible(&self->open_wait);
+			wake_up_interruptible(&self->port.open_wait);
 		} else {
 			IRDA_DEBUG(2,
 				   "%s(), Doing serial hangup..\n", __func__ );
@@ -1092,10 +1067,10 @@ void ircomm_tty_check_modem_status(struct ircomm_tty_cb *self)
 				tty_hangup(tty);
 
 			/* Hangup will remote the tty, so better break out */
-			return;
+			goto put;
 		}
 	}
-	if (self->flags & ASYNC_CTS_FLOW) {
+	if (tty && tty_port_cts_enabled(&self->port)) {
 		if (tty->hw_stopped) {
 			if (status & IRCOMM_CTS) {
 				IRDA_DEBUG(2,
@@ -1103,10 +1078,10 @@ void ircomm_tty_check_modem_status(struct ircomm_tty_cb *self)
 				tty->hw_stopped = 0;
 
 				/* Wake up processes blocked on open */
-				wake_up_interruptible(&self->open_wait);
+				wake_up_interruptible(&self->port.open_wait);
 
 				schedule_work(&self->tqueue);
-				return;
+				goto put;
 			}
 		} else {
 			if (!(status & IRCOMM_CTS)) {
@@ -1116,6 +1091,8 @@ void ircomm_tty_check_modem_status(struct ircomm_tty_cb *self)
 			}
 		}
 	}
+put:
+	tty_kref_put(tty);
 }
 
 /*
@@ -1128,6 +1105,7 @@ static int ircomm_tty_data_indication(void *instance, void *sap,
 				      struct sk_buff *skb)
 {
 	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+	struct tty_struct *tty;
 
 	IRDA_DEBUG(2, "%s()\n", __func__ );
 
@@ -1135,7 +1113,8 @@ static int ircomm_tty_data_indication(void *instance, void *sap,
 	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
 	IRDA_ASSERT(skb != NULL, return -1;);
 
-	if (!self->tty) {
+	tty = tty_port_tty_get(&self->port);
+	if (!tty) {
 		IRDA_DEBUG(0, "%s(), no tty!\n", __func__ );
 		return 0;
 	}
@@ -1146,7 +1125,7 @@ static int ircomm_tty_data_indication(void *instance, void *sap,
 	 * Devices like WinCE can do this, and since they don't send any
 	 * params, we can just as well declare the hardware for running.
 	 */
-	if (self->tty->hw_stopped && (self->flow == FLOW_START)) {
+	if (tty->hw_stopped && (self->flow == FLOW_START)) {
 		IRDA_DEBUG(0, "%s(), polling for line settings!\n", __func__ );
 		ircomm_param_request(self, IRCOMM_POLL, TRUE);
 
@@ -1159,8 +1138,9 @@ static int ircomm_tty_data_indication(void *instance, void *sap,
 	 * Use flip buffer functions since the code may be called from interrupt
 	 * context
 	 */
-	tty_insert_flip_string(self->tty, skb->data, skb->len);
-	tty_flip_buffer_push(self->tty);
+	tty_insert_flip_string(tty, skb->data, skb->len);
+	tty_flip_buffer_push(tty);
+	tty_kref_put(tty);
 
 	/* No need to kfree_skb - see ircomm_ttp_data_indication() */
 
@@ -1211,12 +1191,13 @@ static void ircomm_tty_flow_indication(void *instance, void *sap,
 	IRDA_ASSERT(self != NULL, return;);
 	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
 
-	tty = self->tty;
+	tty = tty_port_tty_get(&self->port);
 
 	switch (cmd) {
 	case FLOW_START:
 		IRDA_DEBUG(2, "%s(), hw start!\n", __func__ );
-		tty->hw_stopped = 0;
+		if (tty)
+			tty->hw_stopped = 0;
 
 		/* ircomm_tty_do_softint will take care of the rest */
 		schedule_work(&self->tqueue);
@@ -1224,15 +1205,19 @@ static void ircomm_tty_flow_indication(void *instance, void *sap,
 	default:  /* If we get here, something is very wrong, better stop */
 	case FLOW_STOP:
 		IRDA_DEBUG(2, "%s(), hw stopped!\n", __func__ );
-		tty->hw_stopped = 1;
+		if (tty)
+			tty->hw_stopped = 1;
 		break;
 	}
+
+	tty_kref_put(tty);
 	self->flow = cmd;
 }
 
 #ifdef CONFIG_PROC_FS
 static void ircomm_tty_line_info(struct ircomm_tty_cb *self, struct seq_file *m)
 {
+	struct tty_struct *tty;
 	char sep;
 
 	seq_printf(m, "State: %s\n", ircomm_tty_state[self->state]);
@@ -1328,40 +1313,43 @@ static void ircomm_tty_line_info(struct ircomm_tty_cb *self, struct seq_file *m)
 
 	seq_puts(m, "Flags:");
 	sep = ' ';
-	if (self->flags & ASYNC_CTS_FLOW) {
+	if (tty_port_cts_enabled(&self->port)) {
 		seq_printf(m, "%cASYNC_CTS_FLOW", sep);
 		sep = '|';
 	}
-	if (self->flags & ASYNC_CHECK_CD) {
+	if (self->port.flags & ASYNC_CHECK_CD) {
 		seq_printf(m, "%cASYNC_CHECK_CD", sep);
 		sep = '|';
 	}
-	if (self->flags & ASYNC_INITIALIZED) {
+	if (self->port.flags & ASYNC_INITIALIZED) {
 		seq_printf(m, "%cASYNC_INITIALIZED", sep);
 		sep = '|';
 	}
-	if (self->flags & ASYNC_LOW_LATENCY) {
+	if (self->port.flags & ASYNC_LOW_LATENCY) {
 		seq_printf(m, "%cASYNC_LOW_LATENCY", sep);
 		sep = '|';
 	}
-	if (self->flags & ASYNC_CLOSING) {
+	if (self->port.flags & ASYNC_CLOSING) {
 		seq_printf(m, "%cASYNC_CLOSING", sep);
 		sep = '|';
 	}
-	if (self->flags & ASYNC_NORMAL_ACTIVE) {
+	if (self->port.flags & ASYNC_NORMAL_ACTIVE) {
 		seq_printf(m, "%cASYNC_NORMAL_ACTIVE", sep);
 		sep = '|';
 	}
 	seq_putc(m, '\n');
 
 	seq_printf(m, "Role: %s\n", self->client ? "client" : "server");
-	seq_printf(m, "Open count: %d\n", self->open_count);
+	seq_printf(m, "Open count: %d\n", self->port.count);
 	seq_printf(m, "Max data size: %d\n", self->max_data_size);
 	seq_printf(m, "Max header size: %d\n", self->max_header_size);
 
-	if (self->tty)
+	tty = tty_port_tty_get(&self->port);
+	if (tty) {
 		seq_printf(m, "Hardware: %s\n",
-			       self->tty->hw_stopped ? "Stopped" : "Running");
+			       tty->hw_stopped ? "Stopped" : "Running");
+		tty_kref_put(tty);
+	}
 }
 
 static int ircomm_tty_proc_show(struct seq_file *m, void *v)
diff --git a/net/irda/ircomm/ircomm_tty_attach.c b/net/irda/ircomm/ircomm_tty_attach.c
index b65d66e0d81..edab393e0c8 100644
--- a/net/irda/ircomm/ircomm_tty_attach.c
+++ b/net/irda/ircomm/ircomm_tty_attach.c
@@ -130,6 +130,8 @@ static int (*state[])(struct ircomm_tty_cb *self, IRCOMM_TTY_EVENT event,
  */
 int ircomm_tty_attach_cable(struct ircomm_tty_cb *self)
 {
+	struct tty_struct *tty;
+
 	IRDA_DEBUG(0, "%s()\n", __func__ );
 
 	IRDA_ASSERT(self != NULL, return -1;);
@@ -142,7 +144,11 @@ int ircomm_tty_attach_cable(struct ircomm_tty_cb *self)
 	}
 
 	/* Make sure nobody tries to write before the link is up */
-	self->tty->hw_stopped = 1;
+	tty = tty_port_tty_get(&self->port);
+	if (tty) {
+		tty->hw_stopped = 1;
+		tty_kref_put(tty);
+	}
 
 	ircomm_tty_ias_register(self);
 
@@ -398,23 +404,26 @@ void ircomm_tty_disconnect_indication(void *instance, void *sap,
 				      struct sk_buff *skb)
 {
 	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
+	struct tty_struct *tty;
 
 	IRDA_DEBUG(2, "%s()\n", __func__ );
 
 	IRDA_ASSERT(self != NULL, return;);
 	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
 
-	if (!self->tty)
+	tty = tty_port_tty_get(&self->port);
+	if (!tty)
 		return;
 
 	/* This will stop control data transfers */
 	self->flow = FLOW_STOP;
 
 	/* Stop data transfers */
-	self->tty->hw_stopped = 1;
+	tty->hw_stopped = 1;
 
 	ircomm_tty_do_event(self, IRCOMM_TTY_DISCONNECT_INDICATION, NULL,
 			    NULL);
+	tty_kref_put(tty);
 }
 
 /*
@@ -550,12 +559,15 @@ void ircomm_tty_connect_indication(void *instance, void *sap,
  */
 void ircomm_tty_link_established(struct ircomm_tty_cb *self)
 {
+	struct tty_struct *tty;
+
 	IRDA_DEBUG(2, "%s()\n", __func__ );
 
 	IRDA_ASSERT(self != NULL, return;);
 	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
 
-	if (!self->tty)
+	tty = tty_port_tty_get(&self->port);
+	if (!tty)
 		return;
 
 	del_timer(&self->watchdog_timer);
@@ -566,19 +578,22 @@ void ircomm_tty_link_established(struct ircomm_tty_cb *self)
 	 * will have to wait for the peer device (DCE) to raise the CTS
 	 * line.
 	 */
-	if ((self->flags & ASYNC_CTS_FLOW) && ((self->settings.dce & IRCOMM_CTS) == 0)) {
+	if (tty_port_cts_enabled(&self->port) &&
+			((self->settings.dce & IRCOMM_CTS) == 0)) {
 		IRDA_DEBUG(0, "%s(), waiting for CTS ...\n", __func__ );
-		return;
+		goto put;
 	} else {
 		IRDA_DEBUG(1, "%s(), starting hardware!\n", __func__ );
 
-		self->tty->hw_stopped = 0;
+		tty->hw_stopped = 0;
 
 		/* Wake up processes blocked on open */
-		wake_up_interruptible(&self->open_wait);
+		wake_up_interruptible(&self->port.open_wait);
 	}
 
 	schedule_work(&self->tqueue);
+put:
+	tty_kref_put(tty);
 }
 
 /*
@@ -977,14 +992,17 @@ static int ircomm_tty_state_ready(struct ircomm_tty_cb *self,
 		ircomm_tty_next_state(self, IRCOMM_TTY_SEARCH);
 		ircomm_tty_start_watchdog_timer(self, 3*HZ);
 
-		if (self->flags & ASYNC_CHECK_CD) {
+		if (self->port.flags & ASYNC_CHECK_CD) {
 			/* Drop carrier */
 			self->settings.dce = IRCOMM_DELTA_CD;
 			ircomm_tty_check_modem_status(self);
 		} else {
+			struct tty_struct *tty = tty_port_tty_get(&self->port);
 			IRDA_DEBUG(0, "%s(), hanging up!\n", __func__ );
-			if (self->tty)
-				tty_hangup(self->tty);
+			if (tty) {
+				tty_hangup(tty);
+				tty_kref_put(tty);
+			}
 		}
 		break;
 	default:
diff --git a/net/irda/ircomm/ircomm_tty_ioctl.c b/net/irda/ircomm/ircomm_tty_ioctl.c
index d0667d68351..b343f50dc8d 100644
--- a/net/irda/ircomm/ircomm_tty_ioctl.c
+++ b/net/irda/ircomm/ircomm_tty_ioctl.c
@@ -52,17 +52,18 @@
  *    Change speed of the driver. If the remote device is a DCE, then this
  *    should make it change the speed of its serial port
  */
-static void ircomm_tty_change_speed(struct ircomm_tty_cb *self)
+static void ircomm_tty_change_speed(struct ircomm_tty_cb *self,
+		struct tty_struct *tty)
 {
 	unsigned int cflag, cval;
 	int baud;
 
 	IRDA_DEBUG(2, "%s()\n", __func__ );
 
-	if (!self->tty || !self->tty->termios || !self->ircomm)
+	if (!self->ircomm)
 		return;
 
-	cflag = self->tty->termios->c_cflag;
+	cflag = tty->termios.c_cflag;
 
 	/*  byte size and parity */
 	switch (cflag & CSIZE) {
@@ -81,7 +82,7 @@ static void ircomm_tty_change_speed(struct ircomm_tty_cb *self)
 		cval |= IRCOMM_PARITY_EVEN;
 
 	/* Determine divisor based on baud rate */
-	baud = tty_get_baud_rate(self->tty);
+	baud = tty_get_baud_rate(tty);
 	if (!baud)
 		baud = 9600;	/* B0 transition handled in rs_set_termios */
 
@@ -90,19 +91,19 @@ static void ircomm_tty_change_speed(struct ircomm_tty_cb *self)
 
 	/* CTS flow control flag and modem status interrupts */
 	if (cflag & CRTSCTS) {
-		self->flags |= ASYNC_CTS_FLOW;
+		self->port.flags |= ASYNC_CTS_FLOW;
 		self->settings.flow_control |= IRCOMM_RTS_CTS_IN;
 		/* This got me. Bummer. Jean II */
 		if (self->service_type == IRCOMM_3_WIRE_RAW)
 			IRDA_WARNING("%s(), enabling RTS/CTS on link that doesn't support it (3-wire-raw)\n", __func__);
 	} else {
-		self->flags &= ~ASYNC_CTS_FLOW;
+		self->port.flags &= ~ASYNC_CTS_FLOW;
 		self->settings.flow_control &= ~IRCOMM_RTS_CTS_IN;
 	}
 	if (cflag & CLOCAL)
-		self->flags &= ~ASYNC_CHECK_CD;
+		self->port.flags &= ~ASYNC_CHECK_CD;
 	else
-		self->flags |= ASYNC_CHECK_CD;
+		self->port.flags |= ASYNC_CHECK_CD;
 #if 0
 	/*
 	 * Set up parity check flag
@@ -148,18 +149,18 @@ void ircomm_tty_set_termios(struct tty_struct *tty,
 			    struct ktermios *old_termios)
 {
 	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
-	unsigned int cflag = tty->termios->c_cflag;
+	unsigned int cflag = tty->termios.c_cflag;
 
 	IRDA_DEBUG(2, "%s()\n", __func__ );
 
 	if ((cflag == old_termios->c_cflag) &&
-	    (RELEVANT_IFLAG(tty->termios->c_iflag) ==
+	    (RELEVANT_IFLAG(tty->termios.c_iflag) ==
 	     RELEVANT_IFLAG(old_termios->c_iflag)))
 	{
 		return;
 	}
 
-	ircomm_tty_change_speed(self);
+	ircomm_tty_change_speed(self, tty);
 
 	/* Handle transition to B0 status */
 	if ((old_termios->c_cflag & CBAUD) &&
@@ -172,7 +173,7 @@ void ircomm_tty_set_termios(struct tty_struct *tty,
 	if (!(old_termios->c_cflag & CBAUD) &&
 	    (cflag & CBAUD)) {
 		self->settings.dte |= IRCOMM_DTR;
-		if (!(tty->termios->c_cflag & CRTSCTS) ||
+		if (!(tty->termios.c_cflag & CRTSCTS) ||
 		    !test_bit(TTY_THROTTLED, &tty->flags)) {
 			self->settings.dte |= IRCOMM_RTS;
 		}
@@ -181,7 +182,7 @@ void ircomm_tty_set_termios(struct tty_struct *tty,
 
 	/* Handle turning off CRTSCTS */
 	if ((old_termios->c_cflag & CRTSCTS) &&
-	    !(tty->termios->c_cflag & CRTSCTS))
+	    !(tty->termios.c_cflag & CRTSCTS))
 	{
 		tty->hw_stopped = 0;
 		ircomm_tty_start(tty);
@@ -270,10 +271,10 @@ static int ircomm_tty_get_serial_info(struct ircomm_tty_cb *self,
 
 	memset(&info, 0, sizeof(info));
 	info.line = self->line;
-	info.flags = self->flags;
+	info.flags = self->port.flags;
 	info.baud_base = self->settings.data_rate;
-	info.close_delay = self->close_delay;
-	info.closing_wait = self->closing_wait;
+	info.close_delay = self->port.close_delay;
+	info.closing_wait = self->port.closing_wait;
 
 	/* For compatibility  */
 	info.type = PORT_16550A;