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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-01-20 14:01:31 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-01-20 14:01:31 -0300
commitb4b7ff4b08e691656c9d77c758fc355833128ac0 (patch)
tree82fcb00e6b918026dc9f2d1f05ed8eee83874cc0 /drivers/tty/tty_port.c
parent35acfa0fc609f2a2cd95cef4a6a9c3a5c38f1778 (diff)
Linux-libre 4.4-gnupck-4.4-gnu
Diffstat (limited to 'drivers/tty/tty_port.c')
-rw-r--r--drivers/tty/tty_port.c28
1 files changed, 4 insertions, 24 deletions
diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c
index 40b31835f..482f33f20 100644
--- a/drivers/tty/tty_port.c
+++ b/drivers/tty/tty_port.c
@@ -22,7 +22,6 @@ void tty_port_init(struct tty_port *port)
memset(port, 0, sizeof(*port));
tty_buffer_init(port);
init_waitqueue_head(&port->open_wait);
- init_waitqueue_head(&port->close_wait);
init_waitqueue_head(&port->delta_msr_wait);
mutex_init(&port->mutex);
mutex_init(&port->buf_mutex);
@@ -131,7 +130,7 @@ EXPORT_SYMBOL(tty_port_free_xmit_buf);
*/
void tty_port_destroy(struct tty_port *port)
{
- cancel_work_sync(&port->buf.work);
+ tty_buffer_cancel_work(port);
tty_buffer_free_all(port);
}
EXPORT_SYMBOL(tty_port_destroy);
@@ -363,16 +362,6 @@ int tty_port_block_til_ready(struct tty_port *port,
unsigned long flags;
DEFINE_WAIT(wait);
- /* block if port is in the process of being closed */
- if (port->flags & ASYNC_CLOSING) {
- wait_event_interruptible_tty(tty, port->close_wait,
- !(port->flags & ASYNC_CLOSING));
- if (port->flags & ASYNC_HUP_NOTIFY)
- return -EAGAIN;
- else
- return -ERESTARTSYS;
- }
-
/* if non-blocking mode is set we can pass directly to open unless
the port has just hung up or is in another error state */
if (tty->flags & (1 << TTY_IO_ERROR)) {
@@ -423,8 +412,7 @@ int tty_port_block_til_ready(struct tty_port *port,
* Never ask drivers if CLOCAL is set, this causes troubles
* on some hardware.
*/
- if (!(port->flags & ASYNC_CLOSING) &&
- (do_clocal || tty_port_carrier_raised(port)))
+ if (do_clocal || tty_port_carrier_raised(port))
break;
if (signal_pending(current)) {
retval = -ERESTARTSYS;
@@ -463,10 +451,7 @@ static void tty_port_drain_delay(struct tty_port *port, struct tty_struct *tty)
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).
- */
+/* Caller holds tty lock. */
int tty_port_close_start(struct tty_port *port,
struct tty_struct *tty, struct file *filp)
{
@@ -502,7 +487,7 @@ int tty_port_close_start(struct tty_port *port,
if (tty->flow_stopped)
tty_driver_flush_buffer(tty);
if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
- tty_wait_until_sent_from_close(tty, port->closing_wait);
+ tty_wait_until_sent(tty, port->closing_wait);
if (port->drain_delay)
tty_port_drain_delay(port, tty);
}
@@ -534,7 +519,6 @@ void tty_port_close_end(struct tty_port *port, struct tty_struct *tty)
wake_up_interruptible(&port->open_wait);
}
port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
- wake_up_interruptible(&port->close_wait);
spin_unlock_irqrestore(&port->lock, flags);
}
EXPORT_SYMBOL(tty_port_close_end);
@@ -543,10 +527,6 @@ 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)