1 files changed, 50 insertions, 68 deletions

diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c
index 58657d64678b..1ee84ccc4bbd 100644
--- a/drivers/usb/serial/opticon.c
+++ b/drivers/usb/serial/opticon.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Opticon USB barcode to serial driver
  *
@@ -5,10 +6,6 @@
  * Copyright (C) 2011 Martin Jansen <martin.jansen@opticon.com>
  * Copyright (C) 2008 - 2009 Greg Kroah-Hartman <gregkh@suse.de>
  * Copyright (C) 2008 - 2009 Novell Inc.
- *
- *	This program is free software; you can redistribute it and/or
- *	modify it under the terms of the GNU General Public License version
- *	2 as published by the Free Software Foundation.
  */
 
 #include <linux/kernel.h>
@@ -44,6 +41,9 @@ struct opticon_private {
 	bool rts;
 	bool cts;
 	int outstanding_urbs;
+	int outstanding_bytes;
+
+	struct usb_anchor anchor;
 };
 
 
@@ -116,7 +116,7 @@ static int send_control_msg(struct usb_serial_port *port, u8 requesttype,
 	retval = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 				requesttype,
 				USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
-				0, 0, buffer, 1, 0);
+				0, 0, buffer, 1, USB_CTRL_SET_TIMEOUT);
 	kfree(buffer);
 
 	if (retval < 0)
@@ -152,6 +152,15 @@ static int opticon_open(struct tty_struct *tty, struct usb_serial_port *port)
 	return res;
 }
 
+static void opticon_close(struct usb_serial_port *port)
+{
+	struct opticon_private *priv = usb_get_serial_port_data(port);
+
+	usb_kill_anchored_urbs(&priv->anchor);
+
+	usb_serial_generic_close(port);
+}
+
 static void opticon_write_control_callback(struct urb *urb)
 {
 	struct usb_serial_port *port = urb->context;
@@ -172,6 +181,7 @@ static void opticon_write_control_callback(struct urb *urb)
 
 	spin_lock_irqsave(&priv->lock, flags);
 	--priv->outstanding_urbs;
+	priv->outstanding_bytes -= urb->transfer_buffer_length;
 	spin_unlock_irqrestore(&priv->lock, flags);
 
 	usb_serial_port_softint(port);
@@ -185,8 +195,8 @@ static int opticon_write(struct tty_struct *tty, struct usb_serial_port *port,
 	struct urb *urb;
 	unsigned char *buffer;
 	unsigned long flags;
-	int status;
 	struct usb_ctrlrequest *dr;
+	int ret = -ENOMEM;
 
 	spin_lock_irqsave(&priv->lock, flags);
 	if (priv->outstanding_urbs > URB_UPPER_LIMIT) {
@@ -195,31 +205,24 @@ static int opticon_write(struct tty_struct *tty, struct usb_serial_port *port,
 		return 0;
 	}
 	priv->outstanding_urbs++;
+	priv->outstanding_bytes += count;
 	spin_unlock_irqrestore(&priv->lock, flags);
 
-	buffer = kmalloc(count, GFP_ATOMIC);
-	if (!buffer) {
-		count = -ENOMEM;
+	buffer = kmemdup(buf, count, GFP_ATOMIC);
+	if (!buffer)
 		goto error_no_buffer;
-	}
 
 	urb = usb_alloc_urb(0, GFP_ATOMIC);
-	if (!urb) {
-		count = -ENOMEM;
+	if (!urb)
 		goto error_no_urb;
-	}
-
-	memcpy(buffer, buf, count);
 
 	usb_serial_debug_data(&port->dev, __func__, count, buffer);
 
 	/* The connected devices do not have a bulk write endpoint,
 	 * to transmit data to de barcode device the control endpoint is used */
 	dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
-	if (!dr) {
-		count = -ENOMEM;
+	if (!dr)
 		goto error_no_dr;
-	}
 
 	dr->bRequestType = USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT;
 	dr->bRequest = 0x01;
@@ -232,13 +235,13 @@ static int opticon_write(struct tty_struct *tty, struct usb_serial_port *port,
 		(unsigned char *)dr, buffer, count,
 		opticon_write_control_callback, port);
 
+	usb_anchor_urb(urb, &priv->anchor);
+
 	/* send it down the pipe */
-	status = usb_submit_urb(urb, GFP_ATOMIC);
-	if (status) {
-		dev_err(&port->dev,
-		"%s - usb_submit_urb(write endpoint) failed status = %d\n",
-							__func__, status);
-		count = status;
+	ret = usb_submit_urb(urb, GFP_ATOMIC);
+	if (ret) {
+		dev_err(&port->dev, "failed to submit write urb: %d\n", ret);
+		usb_unanchor_urb(urb);
 		goto error;
 	}
 
@@ -256,11 +259,13 @@ error_no_urb:
 error_no_buffer:
 	spin_lock_irqsave(&priv->lock, flags);
 	--priv->outstanding_urbs;
+	priv->outstanding_bytes -= count;
 	spin_unlock_irqrestore(&priv->lock, flags);
-	return count;
+
+	return ret;
 }
 
-static int opticon_write_room(struct tty_struct *tty)
+static unsigned int opticon_write_room(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct opticon_private *priv = usb_get_serial_port_data(port);
@@ -282,6 +287,20 @@ static int opticon_write_room(struct tty_struct *tty)
 	return 2048;
 }
 
+static unsigned int opticon_chars_in_buffer(struct tty_struct *tty)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	struct opticon_private *priv = usb_get_serial_port_data(port);
+	unsigned long flags;
+	unsigned int count;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	count = priv->outstanding_bytes;
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return count;
+}
+
 static int opticon_tiocmget(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
@@ -331,42 +350,6 @@ static int opticon_tiocmset(struct tty_struct *tty,
 	return 0;
 }
 
-static int get_serial_info(struct usb_serial_port *port,
-			   struct serial_struct __user *serial)
-{
-	struct serial_struct tmp;
-
-	memset(&tmp, 0x00, sizeof(tmp));
-
-	/* fake emulate a 16550 uart to make userspace code happy */
-	tmp.type		= PORT_16550A;
-	tmp.line		= port->minor;
-	tmp.port		= 0;
-	tmp.irq			= 0;
-	tmp.xmit_fifo_size	= 1024;
-	tmp.baud_base		= 9600;
-	tmp.close_delay		= 5*HZ;
-	tmp.closing_wait	= 30*HZ;
-
-	if (copy_to_user(serial, &tmp, sizeof(*serial)))
-		return -EFAULT;
-	return 0;
-}
-
-static int opticon_ioctl(struct tty_struct *tty,
-			 unsigned int cmd, unsigned long arg)
-{
-	struct usb_serial_port *port = tty->driver_data;
-
-	switch (cmd) {
-	case TIOCGSERIAL:
-		return get_serial_info(port,
-				       (struct serial_struct __user *)arg);
-	}
-
-	return -ENOIOCTLCMD;
-}
-
 static int opticon_port_probe(struct usb_serial_port *port)
 {
 	struct opticon_private *priv;
@@ -376,24 +359,22 @@ static int opticon_port_probe(struct usb_serial_port *port)
 		return -ENOMEM;
 
 	spin_lock_init(&priv->lock);
+	init_usb_anchor(&priv->anchor);
 
 	usb_set_serial_port_data(port, priv);
 
 	return 0;
 }
 
-static int opticon_port_remove(struct usb_serial_port *port)
+static void opticon_port_remove(struct usb_serial_port *port)
 {
 	struct opticon_private *priv = usb_get_serial_port_data(port);
 
 	kfree(priv);
-
-	return 0;
 }
 
 static struct usb_serial_driver opticon_device = {
 	.driver = {
-		.owner =	THIS_MODULE,
 		.name =		"opticon",
 	},
 	.id_table =		id_table,
@@ -403,11 +384,12 @@ static struct usb_serial_driver opticon_device = {
 	.port_probe =		opticon_port_probe,
 	.port_remove =		opticon_port_remove,
 	.open =			opticon_open,
+	.close =		opticon_close,
 	.write =		opticon_write,
 	.write_room = 		opticon_write_room,
+	.chars_in_buffer =	opticon_chars_in_buffer,
 	.throttle =		usb_serial_generic_throttle,
 	.unthrottle =		usb_serial_generic_unthrottle,
-	.ioctl =		opticon_ioctl,
 	.tiocmget =		opticon_tiocmget,
 	.tiocmset =		opticon_tiocmset,
 	.process_read_urb =	opticon_process_read_urb,
@@ -420,4 +402,4 @@ static struct usb_serial_driver * const serial_drivers[] = {
 module_usb_serial_driver(serial_drivers, id_table);
 
 MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");