*/
static DEFINE_MUTEX(hvc_structs_mutex);
-/* Mutex to serialize hvc_open */
-static DEFINE_MUTEX(hvc_open_mutex);
/*
* This value is used to assign a tty->index value to a hvc_struct based
* upon order of exposure via hvc_probe(), when we can not match it to
*/
static int hvc_open(struct tty_struct *tty, struct file * filp)
{
- struct hvc_struct *hp;
+ struct hvc_struct *hp = tty->driver_data;
unsigned long flags;
int rc = 0;
- mutex_lock(&hvc_open_mutex);
-
- hp = tty->driver_data;
- if (!hp) {
- rc = -EIO;
- goto out;
- }
-
spin_lock_irqsave(&hp->port.lock, flags);
/* Check and then increment for fast path open. */
if (hp->port.count++ > 0) {
spin_unlock_irqrestore(&hp->port.lock, flags);
hvc_kick();
- goto out;
+ return 0;
} /* else count == 0 */
spin_unlock_irqrestore(&hp->port.lock, flags);
/* Force wakeup of the polling thread */
hvc_kick();
-out:
- mutex_unlock(&hvc_open_mutex);
return rc;
}