USB: pl2303: clean up driver somewhat

Use u16 rather than __u16.
Fix multi-line comment style.
Remove some comments.
Remove unnecessary whitespace and add some where appropriate.
Drop DRIVER_DESC define.
Merge and simplify multi-line error message.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 34 insertions, 27 deletions

diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 6234d55372cb..a44154ac335c 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -12,7 +12,6 @@
  *
  * See Documentation/usb/usb-serial.txt for more information on using this
  * driver
- *
  */
 
 #include <linux/kernel.h>
@@ -32,11 +31,6 @@
 #include <asm/unaligned.h>
 #include "pl2303.h"
 
-/*
- * Version Information
- */
-#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
-
 static const struct usb_device_id id_table[] = {
         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
@@ -146,27 +140,34 @@ struct pl2303_private {
         u8 line_settings[7];
 };
 
-static int pl2303_vendor_read(__u16 value, __u16 index,
+static int pl2303_vendor_read(u16 value, u16 index,
                 struct usb_serial *serial, unsigned char *buf)
 {
-        int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+        int res;
+
+        res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
                         VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
                         value, index, buf, 1, 100);
+
         dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x  %d - %x\n",
                 VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, value, index,
                 res, buf[0]);
+
         return res;
 }
 
-static int pl2303_vendor_write(__u16 value, __u16 index,
-                struct usb_serial *serial)
+static int pl2303_vendor_write(u16 value, u16 index, struct usb_serial *serial)
 {
-        int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+        int res;
+
+        res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
                         VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
                         value, index, NULL, 0, 100);
+
         dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x  %d\n",
                 VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, value, index,
                 res);
+
         return res;
 }
 
@@ -215,14 +216,14 @@ static int pl2303_startup(struct usb_serial *serial)
                 pl2303_vendor_write(2, 0x24, serial);
 
         kfree(buf);
+
         return 0;
 }
 
 static void pl2303_release(struct usb_serial *serial)
 {
-        struct pl2303_serial_private *spriv;
+        struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 
-        spriv = usb_get_serial_data(serial);
         kfree(spriv);
 }
 
@@ -245,9 +246,8 @@ static int pl2303_port_probe(struct usb_serial_port *port)
 
 static int pl2303_port_remove(struct usb_serial_port *port)
 {
-        struct pl2303_private *priv;
+        struct pl2303_private *priv = usb_get_serial_port_data(port);
 
-        priv = usb_get_serial_port_data(port);
         kfree(priv);
 
         return 0;
@@ -261,8 +261,10 @@ static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value)
         retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
                                  SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
                                  value, 0, NULL, 0, 100);
+
         dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__,
                 value, retval);
+
         return retval;
 }
 
@@ -488,13 +490,13 @@ static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
         u8 control;
 
         spin_lock_irqsave(&priv->lock, flags);
-        /* Change DTR and RTS */
         if (on)
                 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
         else
                 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
         control = priv->line_control;
         spin_unlock_irqrestore(&priv->lock, flags);
+
         pl2303_set_control_lines(port, control);
 }
 
@@ -525,8 +527,8 @@ static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
 
         result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
         if (result) {
-                dev_err(&port->dev, "%s - failed submitting interrupt urb,"
-                        " error %d\n", __func__, result);
+                dev_err(&port->dev, "failed to submit interrupt urb: %d\n",
+                        result);
                 return result;
         }
 
@@ -596,8 +598,10 @@ static int pl2303_tiocmget(struct tty_struct *tty)
 static int pl2303_carrier_raised(struct usb_serial_port *port)
 {
         struct pl2303_private *priv = usb_get_serial_port_data(port);
+
         if (priv->line_status & UART_DCD)
                 return 1;
+
         return 0;
 }
 
@@ -662,6 +666,7 @@ static int pl2303_ioctl(struct tty_struct *tty,
         default:
                 break;
         }
+
         return -ENOIOCTLCMD;
 }
 
@@ -676,6 +681,7 @@ static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
                 state = BREAK_OFF;
         else
                 state = BREAK_ON;
+
         dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
                         state == BREAK_OFF ? "off" : "on");
 
@@ -690,7 +696,6 @@ static void pl2303_update_line_status(struct usb_serial_port *port,
                                       unsigned char *data,
                                       unsigned int actual_length)
 {
-
         struct pl2303_private *priv = usb_get_serial_port_data(port);
         struct tty_struct *tty;
         unsigned long flags;
@@ -702,12 +707,10 @@ static void pl2303_update_line_status(struct usb_serial_port *port,
         idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
         idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
 
-
         if (idv == SIEMENS_VENDOR_ID) {
                 if (idp == SIEMENS_PRODUCT_ID_X65 ||
                     idp == SIEMENS_PRODUCT_ID_SX1 ||
                     idp == SIEMENS_PRODUCT_ID_X75) {
-
                         length = 1;
                         status_idx = 0;
                 }
@@ -721,8 +724,10 @@ static void pl2303_update_line_status(struct usb_serial_port *port,
         prev_line_status = priv->line_status;
         priv->line_status = data[status_idx];
         spin_unlock_irqrestore(&priv->lock, flags);
+
         if (priv->line_status & UART_BREAK_ERROR)
                 usb_serial_handle_break(port);
+
         wake_up_interruptible(&port->port.delta_msr_wait);
 
         tty = tty_port_tty_get(&port->port);
@@ -766,10 +771,11 @@ static void pl2303_read_int_callback(struct urb *urb)
 
 exit:
         retval = usb_submit_urb(urb, GFP_ATOMIC);
-        if (retval)
+        if (retval) {
                 dev_err(&port->dev,
                         "%s - usb_submit_urb failed with result %d\n",
                         __func__, retval);
+        }
 }
 
 static void pl2303_process_read_urb(struct urb *urb)
@@ -791,8 +797,10 @@ static void pl2303_process_read_urb(struct urb *urb)
         if (!urb->actual_length)
                 return;
 
-        /* break takes precedence over parity, */
-        /* which takes precedence over framing errors */
+        /*
+         * Break takes precedence over parity, which takes precedence over
+         * framing errors.
+         */
         if (line_status & UART_BREAK_ERROR)
                 tty_flag = TTY_BREAK;
         else if (line_status & UART_PARITY_ERROR)
@@ -820,7 +828,6 @@ static void pl2303_process_read_urb(struct urb *urb)
         tty_flip_buffer_push(&port->port);
 }
 
-/* All of the device info needed for the PL2303 SIO serial converter */
 static struct usb_serial_driver pl2303_device = {
         .driver = {
                 .owner =        THIS_MODULE,
@@ -832,7 +839,7 @@ static struct usb_serial_driver pl2303_device = {
         .bulk_out_size =        256,
         .open =                 pl2303_open,
         .close =                pl2303_close,
-        .dtr_rts =              pl2303_dtr_rts,
+        .dtr_rts =              pl2303_dtr_rts,
         .carrier_raised =       pl2303_carrier_raised,
         .ioctl =                pl2303_ioctl,
         .break_ctl =            pl2303_break_ctl,
@@ -854,5 +861,5 @@ static struct usb_serial_driver * const serial_drivers[] = {
 
 module_usb_serial_driver(serial_drivers, id_table);
 
-MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver");
 MODULE_LICENSE("GPL");