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USB: pl2303: 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 12:37:21 +01:00 committed by Greg Kroah-Hartman
parent 824d11bef5
commit 6d0cad657a
1 changed files with 3 additions and 3 deletions
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6
drivers/usb/serial/pl2303.c
View File

@ -607,7 +607,7 @@ static int pl2303_tiocmiwait(struct tty_struct *tty, unsigned long arg)
spin_unlock_irqrestore(&priv->lock, flags);
while (1) {
interruptible_sleep_on(&port->delta_msr_wait);
interruptible_sleep_on(&port->port.delta_msr_wait);
/* see if a signal did it */
if (signal_pending(current))
return -ERESTARTSYS;
@ -718,7 +718,7 @@ static void pl2303_update_line_status(struct usb_serial_port *port,
spin_unlock_irqrestore(&priv->lock, flags);
if (priv->line_status & UART_BREAK_ERROR)
usb_serial_handle_break(port);
wake_up_interruptible(&port->delta_msr_wait);
wake_up_interruptible(&port->port.delta_msr_wait);
tty = tty_port_tty_get(&port->port);
if (!tty)
@ -782,7 +782,7 @@ static void pl2303_process_read_urb(struct urb *urb)
line_status = priv->line_status;
priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
spin_unlock_irqrestore(&priv->lock, flags);
wake_up_interruptible(&port->delta_msr_wait);
wake_up_interruptible(&port->port.delta_msr_wait);
if (!urb->actual_length)
return;