* do carrier detect and the dtr_rts method if it supports software
* management of these lines. Note that the dtr/rts raise is done each
* iteration as a hangup may have previously dropped them while we wait.
+ *
+ * Caller holds tty lock.
+ *
+ * NB: May drop and reacquire tty lock when blocking, so tty and tty_port
+ * may have changed state (eg., may have been hung up).
*/
int tty_port_block_til_ready(struct tty_port *port,
schedule_timeout_interruptible(timeout);
}
+/* Caller holds tty lock.
+ * NB: may drop and reacquire tty lock (in tty_wait_until_sent_from_close())
+ * so tty and tty port may have changed state (but not hung up or reopened).
+ */
int tty_port_close_start(struct tty_port *port,
struct tty_struct *tty, struct file *filp)
{
}
EXPORT_SYMBOL(tty_port_close_start);
+/* Caller holds tty lock */
void tty_port_close_end(struct tty_port *port, struct tty_struct *tty)
{
unsigned long flags;
}
EXPORT_SYMBOL(tty_port_close_end);
+/**
+ * tty_port_close
+ *
+ * Caller holds tty lock
+ *
+ * NB: may drop and reacquire tty lock (in tty_port_close_start()->
+ * tty_wait_until_sent_from_close()) so tty and tty_port may have changed
+ * state (but not hung up or reopened).
+ */
void tty_port_close(struct tty_port *port, struct tty_struct *tty,
struct file *filp)
{
}
EXPORT_SYMBOL_GPL(tty_port_install);
+/**
+ * tty_port_open
+ *
+ * Caller holds tty lock.
+ *
+ * NB: may drop and reacquire tty lock (in tty_port_block_til_ready()) so
+ * tty and tty_port may have changed state (eg., may be hung up now)
+ */
int tty_port_open(struct tty_port *port, struct tty_struct *tty,
struct file *filp)
{