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path: root/drivers/usb/serial/io_ti.c
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Diffstat (limited to 'drivers/usb/serial/io_ti.c')
-rw-r--r--drivers/usb/serial/io_ti.c89
1 files changed, 22 insertions, 67 deletions
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c
index 82afc4d6a327..641ab3da2d83 100644
--- a/drivers/usb/serial/io_ti.c
+++ b/drivers/usb/serial/io_ti.c
@@ -521,65 +521,6 @@ exit_is_tx_active:
return bytes_left;
}
-static void chase_port(struct edgeport_port *port, unsigned long timeout,
- int flush)
-{
- int baud_rate;
- struct tty_struct *tty = tty_port_tty_get(&port->port->port);
- struct usb_serial *serial = port->port->serial;
- wait_queue_t wait;
- unsigned long flags;
-
- if (!tty)
- return;
-
- if (!timeout)
- timeout = (HZ * EDGE_CLOSING_WAIT)/100;
-
- /* wait for data to drain from the buffer */
- spin_lock_irqsave(&port->ep_lock, flags);
- init_waitqueue_entry(&wait, current);
- add_wait_queue(&tty->write_wait, &wait);
- for (;;) {
- set_current_state(TASK_INTERRUPTIBLE);
- if (kfifo_len(&port->write_fifo) == 0
- || timeout == 0 || signal_pending(current)
- || serial->disconnected)
- /* disconnect */
- break;
- spin_unlock_irqrestore(&port->ep_lock, flags);
- timeout = schedule_timeout(timeout);
- spin_lock_irqsave(&port->ep_lock, flags);
- }
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&tty->write_wait, &wait);
- if (flush)
- kfifo_reset_out(&port->write_fifo);
- spin_unlock_irqrestore(&port->ep_lock, flags);
- tty_kref_put(tty);
-
- /* wait for data to drain from the device */
- timeout += jiffies;
- while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
- && !serial->disconnected) {
- /* not disconnected */
- if (!tx_active(port))
- break;
- msleep(10);
- }
-
- /* disconnected */
- if (serial->disconnected)
- return;
-
- /* wait one more character time, based on baud rate */
- /* (tx_active doesn't seem to wait for the last byte) */
- baud_rate = port->baud_rate;
- if (baud_rate == 0)
- baud_rate = 50;
- msleep(max(1, DIV_ROUND_UP(10000, baud_rate)));
-}
-
static int choose_config(struct usb_device *dev)
{
/*
@@ -1944,6 +1885,8 @@ static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
++edge_serial->num_ports_open;
+ port->port.drain_delay = 1;
+
goto release_es_lock;
unlink_int_urb:
@@ -1959,6 +1902,7 @@ static void edge_close(struct usb_serial_port *port)
struct edgeport_serial *edge_serial;
struct edgeport_port *edge_port;
struct usb_serial *serial = port->serial;
+ unsigned long flags;
int port_number;
edge_serial = usb_get_serial_data(port->serial);
@@ -1970,12 +1914,12 @@ static void edge_close(struct usb_serial_port *port)
* this flag and dump add read data */
edge_port->close_pending = 1;
- /* chase the port close and flush */
- chase_port(edge_port, (HZ * closing_wait) / 100, 1);
-
usb_kill_urb(port->read_urb);
usb_kill_urb(port->write_urb);
edge_port->ep_write_urb_in_use = 0;
+ spin_lock_irqsave(&edge_port->ep_lock, flags);
+ kfifo_reset_out(&edge_port->write_fifo);
+ spin_unlock_irqrestore(&edge_port->ep_lock, flags);
/* assuming we can still talk to the device,
* send a close port command to it */
@@ -2101,16 +2045,21 @@ static int edge_chars_in_buffer(struct tty_struct *tty)
struct edgeport_port *edge_port = usb_get_serial_port_data(port);
int chars = 0;
unsigned long flags;
+ int ret;
if (edge_port == NULL)
return 0;
- if (edge_port->close_pending == 1)
- return 0;
spin_lock_irqsave(&edge_port->ep_lock, flags);
chars = kfifo_len(&edge_port->write_fifo);
spin_unlock_irqrestore(&edge_port->ep_lock, flags);
+ if (!chars) {
+ ret = tx_active(edge_port);
+ if (ret > 0)
+ chars = ret;
+ }
+
dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
return chars;
}
@@ -2448,10 +2397,15 @@ static int get_serial_info(struct edgeport_port *edge_port,
struct serial_struct __user *retinfo)
{
struct serial_struct tmp;
+ unsigned cwait;
if (!retinfo)
return -EFAULT;
+ cwait = edge_port->port->port.closing_wait;
+ if (cwait != ASYNC_CLOSING_WAIT_NONE)
+ cwait = jiffies_to_msecs(closing_wait) / 10;
+
memset(&tmp, 0, sizeof(tmp));
tmp.type = PORT_16550A;
@@ -2462,7 +2416,7 @@ static int get_serial_info(struct edgeport_port *edge_port,
tmp.xmit_fifo_size = edge_port->port->bulk_out_size;
tmp.baud_base = 9600;
tmp.close_delay = 5*HZ;
- tmp.closing_wait = closing_wait;
+ tmp.closing_wait = cwait;
if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
return -EFAULT;
@@ -2517,8 +2471,7 @@ static void edge_break(struct tty_struct *tty, int break_state)
int status;
int bv = 0; /* Off */
- /* chase the port close */
- chase_port(edge_port, 0, 0);
+ tty_wait_until_sent(tty, 0);
if (break_state == -1)
bv = 1; /* On */
@@ -2591,6 +2544,8 @@ static int edge_port_probe(struct usb_serial_port *port)
return ret;
}
+ port->port.closing_wait = msecs_to_jiffies(closing_wait * 10);
+
return 0;
}