summaryrefslogtreecommitdiff
path: root/drivers/char/vt.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/char/vt.c')
-rw-r--r--drivers/char/vt.c34
1 files changed, 17 insertions, 17 deletions
diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index ec94521c3118..37a45db5bae0 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -2758,6 +2758,12 @@ static int con_open(struct tty_struct *tty, struct file *filp)
ret = vc_allocate(currcons);
if (ret == 0) {
struct vc_data *vc = vc_cons[currcons].d;
+
+ /* Still being freed */
+ if (vc->vc_tty) {
+ release_console_sem();
+ return -ERESTARTSYS;
+ }
tty->driver_data = vc;
vc->vc_tty = tty;
@@ -2787,25 +2793,18 @@ static int con_open(struct tty_struct *tty, struct file *filp)
*/
static void con_close(struct tty_struct *tty, struct file *filp)
{
- mutex_lock(&tty_mutex);
- acquire_console_sem();
- if (tty && tty->count == 1) {
- struct vc_data *vc = tty->driver_data;
+ /* Nothing to do - we defer to shutdown */
+}
- if (vc)
- vc->vc_tty = NULL;
- tty->driver_data = NULL;
- vcs_remove_sysfs(tty);
- release_console_sem();
- mutex_unlock(&tty_mutex);
- /*
- * tty_mutex is released, but we still hold BKL, so there is
- * still exclusion against init_dev()
- */
- return;
- }
+static void con_shutdown(struct tty_struct *tty)
+{
+ struct vc_data *vc = tty->driver_data;
+ BUG_ON(vc == NULL);
+ acquire_console_sem();
+ vc->vc_tty = NULL;
+ vcs_remove_sysfs(tty);
release_console_sem();
- mutex_unlock(&tty_mutex);
+ tty_shutdown(tty);
}
static int default_italic_color = 2; // green (ASCII)
@@ -2930,6 +2929,7 @@ static const struct tty_operations con_ops = {
.throttle = con_throttle,
.unthrottle = con_unthrottle,
.resize = vt_resize,
+ .shutdown = con_shutdown
};
int __init vty_init(void)