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path: root/drivers/usb/serial/pl2303.c
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Diffstat (limited to 'drivers/usb/serial/pl2303.c')
-rw-r--r--drivers/usb/serial/pl2303.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 54adc9125e5..3b10018d89a 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -139,7 +139,6 @@ struct pl2303_serial_private {
struct pl2303_private {
spinlock_t lock;
- wait_queue_head_t delta_msr_wait;
u8 line_control;
u8 line_status;
};
@@ -233,7 +232,6 @@ static int pl2303_port_probe(struct usb_serial_port *port)
return -ENOMEM;
spin_lock_init(&priv->lock);
- init_waitqueue_head(&priv->delta_msr_wait);
usb_set_serial_port_data(port, priv);
@@ -607,11 +605,14 @@ static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
spin_unlock_irqrestore(&priv->lock, flags);
while (1) {
- interruptible_sleep_on(&priv->delta_msr_wait);
+ interruptible_sleep_on(&port->delta_msr_wait);
/* see if a signal did it */
if (signal_pending(current))
return -ERESTARTSYS;
+ if (port->serial->disconnected)
+ return -EIO;
+
spin_lock_irqsave(&priv->lock, flags);
status = priv->line_status;
spin_unlock_irqrestore(&priv->lock, flags);
@@ -719,7 +720,7 @@ 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(&priv->delta_msr_wait);
+ wake_up_interruptible(&port->delta_msr_wait);
tty = tty_port_tty_get(&port->port);
if (!tty)
@@ -783,7 +784,7 @@ 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(&priv->delta_msr_wait);
+ wake_up_interruptible(&port->delta_msr_wait);
if (!urb->actual_length)
return;