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USB: oti6858: fix TIOCMIWAIT and disconnect 

Use tty-port modem-status-change wait queue on which processes are woken
up at hangup and disconnect.

Currently a process waiting on modem-status changes will not be woken on
device disconnect.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2013-03-21 12:37:19 +01:00 committed by Greg Kroah-Hartman
parent 1c9f995363
commit 215f6f0466
1 changed files with 2 additions and 2 deletions
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4
drivers/usb/serial/oti6858.c
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@ -662,7 +662,7 @@ static int oti6858_tiocmiwait(struct tty_struct *tty, unsigned long arg)
spin_unlock_irqrestore(&priv->lock, flags);
while (1) {
wait_event_interruptible(port->delta_msr_wait,
wait_event_interruptible(port->port.delta_msr_wait,
port->serial->disconnected ||
priv->status.pin_state != prev);
if (signal_pending(current))
@ -747,7 +747,7 @@ static void oti6858_read_int_callback(struct urb *urb)
if (!priv->transient) {
if (xs->pin_state != priv->status.pin_state)
wake_up_interruptible(&port->delta_msr_wait);
wake_up_interruptible(&port->port.delta_msr_wait);
memcpy(&priv->status, xs, OTI6858_CTRL_PKT_SIZE);
}