[PATCH 78/80] fs3270: remove extra locks

Alan Cox
2008-10-13T10:08:11Z

get_current_tty now does internal locking and returns a referenced object,
thus our use of tty_mutex here can go away.

Signed-off-by: Alan Cox <alan@redhat.com>
---

drivers/s390/char/fs3270.c | 6 +-----
1 files changed, 1 insertions(+), 5 deletions(-)

diff --git a/drivers/s390/char/fs3270.c b/drivers/s390/char/fs3270.c
index 84fbc90..1227f45 100644
--- a/drivers/s390/char/fs3270.c
+++ b/drivers/s390/char/fs3270.c
@@ -426,18 +426,14 @@ fs3270_open(struct inode *inode, struct file *filp)
minor = iminor(filp->f_path.dentry->d_inode);
/* Check for minor 0 multiplexer. */
if (minor == 0) {
- struct tty_struct *tty;
- mutex_lock(&tty_mutex);
- tty = get_current_tty();
+ struct tty_struct *tty = get_current_tty();
if (!tty || tty->driver->major != IBM_TTY3270_MAJOR) {
tty_kref_put(tty);
- mutex_unlock(&tty_mutex);
rc = -ENODEV;
goto out;
}
minor = tty->index + RAW3270_FIRSTMINOR;
tty_kref_put(tty);
- mutex_unlock(&tty_mutex);
}
/* Check if some other program is already using fullscreen mode. */
fp = (struct fs3270 *) raw3270_find_view(&fs3270_fn, minor);