linux-kernel - [PATCH 1/6] TTY: um/line, add tty

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Date:	Mon,  4 Jun 2012 22:27:32 +0200
From:	Richard Weinberger <richard@....at>
To:	jslaby@...e.cz
Cc:	user-mode-linux-devel@...ts.sourceforge.net,
	gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
	viro@...iv.linux.org.uk, alan@...ux.intel.com,
	Jeff Dike <jdike@...toit.com>,
	Richard Weinberger <richard@....at>
Subject: [PATCH 1/6] TTY: um/line, add tty_port

From: Jiri Slaby <jslaby@...e.cz>

And use count from there.

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Cc: Jeff Dike <jdike@...toit.com>
Cc: Richard Weinberger <richard@....at>
Cc: user-mode-linux-devel@...ts.sourceforge.net
Signed-off-by: Richard Weinberger <richard@....at>
---
 arch/um/drivers/line.c |    7 ++++---
 arch/um/drivers/line.h |    2 +-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index acfd0e0..482a7bd 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 0a18347..0e06a1f 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;
-- 
1.7.7.3

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