[PATCH v2 67/85] USB: ssu100: switch to generic TIOCMIWAIT implementation

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Switch to the generic TIOCMIWAIT implementation.

Signed-off-by: Johan Hovold <jhovold@xxxxxxxxx>
---
 drivers/usb/serial/ssu100.c | 47 ++-------------------------------------------
 1 file changed, 2 insertions(+), 45 deletions(-)

diff --git a/drivers/usb/serial/ssu100.c b/drivers/usb/serial/ssu100.c
index 0965b02..65faa6e 100644
--- a/drivers/usb/serial/ssu100.c
+++ b/drivers/usb/serial/ssu100.c
@@ -61,7 +61,6 @@ struct ssu100_port_private {
 	spinlock_t status_lock;
 	u8 shadowLSR;
 	u8 shadowMSR;
-	wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
 };
 
 static inline int ssu100_control_msg(struct usb_device *dev,
@@ -338,43 +337,6 @@ static int get_serial_info(struct usb_serial_port *port,
 	return 0;
 }
 
-static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
-{
-	struct ssu100_port_private *priv = usb_get_serial_port_data(port);
-	struct async_icount prev, cur;
-	unsigned long flags;
-
-	spin_lock_irqsave(&priv->status_lock, flags);
-	prev = port->icount;
-	spin_unlock_irqrestore(&priv->status_lock, flags);
-
-	while (1) {
-		wait_event_interruptible(priv->delta_msr_wait,
-					 (port->serial->disconnected ||
-					  (port->icount.rng != prev.rng) ||
-					  (port->icount.dsr != prev.dsr) ||
-					  (port->icount.dcd != prev.dcd) ||
-					  (port->icount.cts != prev.cts)));
-
-		if (signal_pending(current))
-			return -ERESTARTSYS;
-
-		if (port->serial->disconnected)
-			return -EIO;
-
-		spin_lock_irqsave(&priv->status_lock, flags);
-		cur = port->icount;
-		spin_unlock_irqrestore(&priv->status_lock, flags);
-
-		if ((arg & TIOCM_RNG && (prev.rng != cur.rng)) ||
-		    (arg & TIOCM_DSR && (prev.dsr != cur.dsr)) ||
-		    (arg & TIOCM_CD  && (prev.dcd != cur.dcd)) ||
-		    (arg & TIOCM_CTS && (prev.cts != cur.cts)))
-			return 0;
-	}
-	return 0;
-}
-
 static int ssu100_ioctl(struct tty_struct *tty,
 		    unsigned int cmd, unsigned long arg)
 {
@@ -386,10 +348,6 @@ static int ssu100_ioctl(struct tty_struct *tty,
 	case TIOCGSERIAL:
 		return get_serial_info(port,
 				       (struct serial_struct __user *) arg);
-
-	case TIOCMIWAIT:
-		return wait_modem_info(port, arg);
-
 	default:
 		break;
 	}
@@ -413,7 +371,6 @@ static int ssu100_port_probe(struct usb_serial_port *port)
 		return -ENOMEM;
 
 	spin_lock_init(&priv->status_lock);
-	init_waitqueue_head(&priv->delta_msr_wait);
 
 	usb_set_serial_port_data(port, priv);
 
@@ -425,7 +382,6 @@ static int ssu100_port_remove(struct usb_serial_port *port)
 	struct ssu100_port_private *priv;
 
 	priv = usb_get_serial_port_data(port);
-	wake_up_interruptible(&priv->delta_msr_wait);
 	kfree(priv);
 
 	return 0;
@@ -506,7 +462,7 @@ static void ssu100_update_msr(struct usb_serial_port *port, u8 msr)
 			port->icount.dcd++;
 		if (msr & UART_MSR_TERI)
 			port->icount.rng++;
-		wake_up_interruptible(&priv->delta_msr_wait);
+		wake_up_interruptible(&port->delta_msr_wait);
 	}
 }
 
@@ -604,6 +560,7 @@ static struct usb_serial_driver ssu100_device = {
 	.process_read_urb    = ssu100_process_read_urb,
 	.tiocmget            = ssu100_tiocmget,
 	.tiocmset            = ssu100_tiocmset,
+	.tiocmiwait          = usb_serial_generic_tiocmiwait,
 	.get_icount	     = usb_serial_generic_get_icount,
 	.ioctl               = ssu100_ioctl,
 	.set_termios         = ssu100_set_termios,
-- 
1.8.1.5

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