Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (58 commits)
  tty: split the lock up a bit further
  tty: Move the leader test in disassociate
  tty: Push the bkl down a bit in the hangup code
  tty: Push the lock down further into the ldisc code
  tty: push the BKL down into the handlers a bit
  tty: moxa: split open lock
  tty: moxa: Kill the use of lock_kernel
  tty: moxa: Fix modem op locking
  tty: moxa: Kill off the throttle method
  tty: moxa: Locking clean up
  tty: moxa: rework the locking a bit
  tty: moxa: Use more tty_port ops
  tty: isicom: fix deadlock on shutdown
  tty: mxser: Use the new locking rules to fix setserial properly
  tty: mxser: use the tty_port_open method
  tty: isicom: sort out the board init logic
  tty: isicom: switch to the new tty_port_open helper
  tty: tty_port: Add a kref object to the tty port
  tty: istallion: tty port open/close methods
  tty: stallion: Convert to the tty_port_open/close methods
  ...

1 files changed, 23 insertions, 2 deletions

diff --git a/include/linux/tty.h b/include/linux/tty.h
index f0f43d08d8b..405a9035fe4 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -190,9 +190,17 @@ struct tty_port_operations {
 	/* Control the DTR line */
 	void (*dtr_rts)(struct tty_port *port, int raise);
 	/* Called when the last close completes or a hangup finishes
-	   IFF the port was initialized. Do not use to free resources */
+	   IFF the port was initialized. Do not use to free resources. Called
+	   under the port mutex to serialize against activate/shutdowns */
 	void (*shutdown)(struct tty_port *port);
 	void (*drop)(struct tty_port *port);
+	/* Called under the port mutex from tty_port_open, serialized using
+	   the port mutex */
+        /* FIXME: long term getting the tty argument *out* of this would be
+           good for consoles */
+	int (*activate)(struct tty_port *port, struct tty_struct *tty);
+	/* Called on the final put of a port */
+	void (*destruct)(struct tty_port *port);
 };
 	
 struct tty_port {
@@ -206,12 +214,14 @@ struct tty_port {
 	wait_queue_head_t	delta_msr_wait;	/* Modem status change */
 	unsigned long		flags;		/* TTY flags ASY_*/
 	struct mutex		mutex;		/* Locking */
+	struct mutex		buf_mutex;	/* Buffer alloc lock */
 	unsigned char		*xmit_buf;	/* Optional buffer */
 	unsigned int		close_delay;	/* Close port delay */
 	unsigned int		closing_wait;	/* Delay for output */
 	int			drain_delay;	/* Set to zero if no pure time
 						   based drain is needed else
 						   set to size of fifo */
+	struct kref		kref;		/* Ref counter */
 };
 
 /*
@@ -439,7 +449,7 @@ extern void initialize_tty_struct(struct tty_struct *tty,
 		struct tty_driver *driver, int idx);
 extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx,
 								int first_ok);
-extern void tty_release_dev(struct file *filp);
+extern int tty_release(struct inode *inode, struct file *filp);
 extern int tty_init_termios(struct tty_struct *tty);
 
 extern struct tty_struct *tty_pair_get_tty(struct tty_struct *tty);
@@ -454,6 +464,15 @@ extern int tty_write_lock(struct tty_struct *tty, int ndelay);
 extern void tty_port_init(struct tty_port *port);
 extern int tty_port_alloc_xmit_buf(struct tty_port *port);
 extern void tty_port_free_xmit_buf(struct tty_port *port);
+extern void tty_port_put(struct tty_port *port);
+
+extern inline struct tty_port *tty_port_get(struct tty_port *port)
+{
+	if (port)
+		kref_get(&port->kref);
+	return port;
+}
+
 extern struct tty_struct *tty_port_tty_get(struct tty_port *port);
 extern void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty);
 extern int tty_port_carrier_raised(struct tty_port *port);
@@ -467,6 +486,8 @@ extern int tty_port_close_start(struct tty_port *port,
 extern void tty_port_close_end(struct tty_port *port, struct tty_struct *tty);
 extern void tty_port_close(struct tty_port *port,
 				struct tty_struct *tty, struct file *filp);
+extern int tty_port_open(struct tty_port *port,
+				struct tty_struct *tty, struct file *filp);
 extern inline int tty_port_users(struct tty_port *port)
 {
 	return port->count + port->blocked_open;