1 files changed, 13 insertions, 25 deletions

diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c
index 68e80be6b9e..68b0aa5e516 100644
--- a/drivers/usb/serial/digi_acceleport.c
+++ b/drivers/usb/serial/digi_acceleport.c
@@ -470,18 +470,18 @@ static int digi_read_oob_callback(struct urb *urb);
 
 static int debug;
 
-static struct usb_device_id id_table_combined [] = {
+static const struct usb_device_id id_table_combined[] = {
 	{ USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) },
 	{ USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) },
 	{ }						/* Terminating entry */
 };
 
-static struct usb_device_id id_table_2 [] = {
+static const struct usb_device_id id_table_2[] = {
 	{ USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) },
 	{ }						/* Terminating entry */
 };
 
-static struct usb_device_id id_table_4 [] = {
+static const struct usb_device_id id_table_4[] = {
 	{ USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) },
 	{ }						/* Terminating entry */
 };
@@ -1262,10 +1262,10 @@ static void digi_write_bulk_callback(struct urb *urb)
 		return;
 	}
 
-	/* try to send any buffered data on this port, if it is open */
+	/* try to send any buffered data on this port */
 	spin_lock(&priv->dp_port_lock);
 	priv->dp_write_urb_in_use = 0;
-	if (port->port.count && priv->dp_out_buf_len > 0) {
+	if (priv->dp_out_buf_len > 0) {
 		*((unsigned char *)(port->write_urb->transfer_buffer))
 			= (unsigned char)DIGI_CMD_SEND_DATA;
 		*((unsigned char *)(port->write_urb->transfer_buffer) + 1)
@@ -1288,7 +1288,7 @@ static void digi_write_bulk_callback(struct urb *urb)
 	schedule_work(&priv->dp_wakeup_work);
 
 	spin_unlock(&priv->dp_port_lock);
-	if (ret)
+	if (ret && ret != -EPERM)
 		dev_err(&port->dev,
 			"%s: usb_submit_urb failed, ret=%d, port=%d\n",
 			__func__, ret, priv->dp_port_num);
@@ -1353,8 +1353,7 @@ static int digi_open(struct tty_struct *tty, struct usb_serial_port *port)
 	struct digi_port *priv = usb_get_serial_port_data(port);
 	struct ktermios not_termios;
 
-	dbg("digi_open: TOP: port=%d, open_count=%d",
-		priv->dp_port_num, port->port.count);
+	dbg("digi_open: TOP: port=%d", priv->dp_port_num);
 
 	/* be sure the device is started up */
 	if (digi_startup_device(port->serial) != 0)
@@ -1393,8 +1392,7 @@ static void digi_close(struct usb_serial_port *port)
 	unsigned char buf[32];
 	struct digi_port *priv = usb_get_serial_port_data(port);
 
-	dbg("digi_close: TOP: port=%d, open_count=%d",
-		priv->dp_port_num, port->port.count);
+	dbg("digi_close: TOP: port=%d", priv->dp_port_num);
 
 	mutex_lock(&port->serial->disc_mutex);
 	/* if disconnected, just clear flags */
@@ -1629,7 +1627,7 @@ static void digi_read_bulk_callback(struct urb *urb)
 	/* continue read */
 	urb->dev = port->serial->dev;
 	ret = usb_submit_urb(urb, GFP_ATOMIC);
-	if (ret != 0) {
+	if (ret != 0 && ret != -EPERM) {
 		dev_err(&port->dev,
 			"%s: failed resubmitting urb, ret=%d, port=%d\n",
 			__func__, ret, priv->dp_port_num);
@@ -1658,12 +1656,11 @@ static int digi_read_inb_callback(struct urb *urb)
 	int port_status = ((unsigned char *)urb->transfer_buffer)[2];
 	unsigned char *data = ((unsigned char *)urb->transfer_buffer) + 3;
 	int flag, throttled;
-	int i;
 	int status = urb->status;
 
 	/* do not process callbacks on closed ports */
 	/* but do continue the read chain */
-	if (port->port.count == 0)
+	if (urb->status == -ENOENT)
 		return 0;
 
 	/* short/multiple packet check */
@@ -1705,17 +1702,9 @@ static int digi_read_inb_callback(struct urb *urb)
 
 		/* data length is len-1 (one byte of len is port_status) */
 		--len;
-
-		len = tty_buffer_request_room(tty, len);
 		if (len > 0) {
-			/* Hot path */
-			if (flag == TTY_NORMAL)
-				tty_insert_flip_string(tty, data, len);
-			else {
-				for (i = 0; i < len; i++)
-					tty_insert_flip_char(tty,
-								data[i], flag);
-			}
+			tty_insert_flip_string_fixed_flag(tty, data, len,
+									flag);
 			tty_flip_buffer_push(tty);
 		}
 	}
@@ -1776,8 +1765,7 @@ static int digi_read_oob_callback(struct urb *urb)
 
 		tty = tty_port_tty_get(&port->port);
 		rts = 0;
-		if (port->port.count)
-			rts = tty->termios->c_cflag & CRTSCTS;
+		rts = tty->termios->c_cflag & CRTSCTS;
 		
 		if (opcode == DIGI_CMD_READ_INPUT_SIGNALS) {
 			spin_lock(&priv->dp_port_lock);