TTY: um/line, add tty_port

And use count from there.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: user-mode-linux-devel@lists.sourceforge.net
Signed-off-by: Richard Weinberger <richard@nod.at>

2 files changed, 5 insertions, 4 deletions

diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index acfd0e0fd0c9..482a7bd4a64c 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -404,7 +404,7 @@ int line_open(struct line *lines, struct tty_struct *tty)
                 goto out_unlock;
 
         err = 0;
-        if (line->count++)
+        if (line->port.count++)
                 goto out_unlock;
 
         BUG_ON(tty->driver_data);
@@ -446,7 +446,7 @@ void line_close(struct tty_struct *tty, struct file * filp)
         mutex_lock(&line->count_lock);
         BUG_ON(!line->valid);
 
-        if (--line->count)
+        if (--line->port.count)
                 goto out_unlock;
 
         line->tty = NULL;
@@ -478,7 +478,7 @@ int setup_one_line(struct line *lines, int n, char *init,
 
         mutex_lock(&line->count_lock);
 
-        if (line->count) {
+        if (line->port.count) {
                 *error_out = "Device is already open";
                 goto out;
         }
@@ -663,6 +663,7 @@ int register_lines(struct line_driver *line_driver,
         driver->init_termios = tty_std_termios;
         
         for (i = 0; i < nlines; i++) {
+                tty_port_init(&lines[i].port);
                 spin_lock_init(&lines[i].lock);
                 mutex_init(&lines[i].count_lock);
                 lines[i].driver = line_driver;
diff --git a/arch/um/drivers/line.h b/arch/um/drivers/line.h
index 0a1834719dba..0e06a1f441d7 100644
--- a/arch/um/drivers/line.h
+++ b/arch/um/drivers/line.h
@@ -32,9 +32,9 @@ struct line_driver {
 };
 
 struct line {
+        struct tty_port port;
         struct tty_struct *tty;
         struct mutex count_lock;
-        unsigned long count;
         int valid;
 
         char *init_str;