mxser_new, lock count and flags
Both open count and INITIALIZED flag should be changed under lock.
Signed-off-by: Jiri Slaby <[email protected]>
Cc: <[email protected]>
---
commit 76b3ee2d5737395df62553cec1b8193252476147
tree dfc50c164ddde6b73a954f694dfdcb98ed921629
parent f49b6914c3113f930a31ff7b8f811744f2d8f339
author Jiri Slaby <[email protected]> Sat, 20 Jan 2007 17:18:24 +0059
committer Jiri Slaby <[email protected]> Sat, 20 Jan 2007 17:18:24 +0059
drivers/char/mxser_new.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/drivers/char/mxser_new.c b/drivers/char/mxser_new.c
index 1c8e00c..d52ecff 100644
--- a/drivers/char/mxser_new.c
+++ b/drivers/char/mxser_new.c
@@ -853,9 +853,9 @@ static int mxser_startup(struct mxser_port *info)
* and set the speed of the serial port
*/
mxser_change_speed(info, NULL);
+ info->flags |= ASYNC_INITIALIZED;
spin_unlock_irqrestore(&info->slock, flags);
- info->flags |= ASYNC_INITIALIZED;
return 0;
}
@@ -925,6 +925,7 @@ static void mxser_shutdown(struct mxser_port *info)
static int mxser_open(struct tty_struct *tty, struct file *filp)
{
struct mxser_port *info;
+ unsigned long flags;
int retval, line;
line = tty->index;
@@ -941,7 +942,9 @@ static int mxser_open(struct tty_struct *tty, struct file *filp)
/*
* Start up serial port
*/
+ spin_lock_irqsave(&info->slock, flags);
info->count++;
+ spin_unlock_irqrestore(&info->slock, flags);
retval = mxser_startup(info);
if (retval)
return retval;
-
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