From c1284d7726c57c9d2bbc65cd08173fe7f9e637df Mon Sep 17 00:00:00 2001
From: Johan Hovold <jhovold@gmail.com>
Date: Thu, 24 Dec 2009 12:42:11 +0100
Subject: [PATCH] USB: ftdi_sio: remove unnecessary initialisations
Return values are being initialised to zero only to be unconditionally
assigned to a few instructions later. This may give the impression that
zero is returned on success, which is not the case.
Note also that ftdi_NDI_device_setup never reports errors.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/usb/serial/ftdi_sio.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 58698a6f837b2d..37db5a09a53410 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1142,7 +1142,7 @@ static int write_latency_timer(struct usb_serial_port *port)
{
struct ftdi_private *priv = usb_get_serial_port_data(port);
struct usb_device *udev = port->serial->dev;
- int rv = 0;
+ int rv;
int l = priv->latency;
if (priv->flags & ASYNC_LOW_LATENCY)
@@ -1166,7 +1166,7 @@ static int read_latency_timer(struct usb_serial_port *port)
struct ftdi_private *priv = usb_get_serial_port_data(port);
struct usb_device *udev = port->serial->dev;
unsigned char *buf;
- int rv = 0;
+ int rv;
dbg("%s", __func__);
@@ -1360,7 +1360,7 @@ static void ftdi_set_max_packet_size(struct usb_serial_port *port)
struct usb_endpoint_descriptor *ep_desc = &interface->cur_altsetting->endpoint[1].desc;
unsigned num_endpoints;
- int i = 0;
+ int i;
num_endpoints = interface->cur_altsetting->desc.bNumEndpoints;
dev_info(&udev->dev, "Number of endpoints %d\n", num_endpoints);
@@ -1412,7 +1412,7 @@ static ssize_t store_latency_timer(struct device *dev,
struct usb_serial_port *port = to_usb_serial_port(dev);
struct ftdi_private *priv = usb_get_serial_port_data(port);
int v = simple_strtoul(valbuf, NULL, 10);
- int rv = 0;
+ int rv;
priv->latency = v;
rv = write_latency_timer(port);
@@ -1430,7 +1430,7 @@ static ssize_t store_event_char(struct device *dev,
struct ftdi_private *priv = usb_get_serial_port_data(port);
struct usb_device *udev = port->serial->dev;
int v = simple_strtoul(valbuf, NULL, 10);
- int rv = 0;
+ int rv;
dbg("%s: setting event char = %i", __func__, v);
@@ -1617,7 +1617,6 @@ static int ftdi_NDI_device_setup(struct usb_serial *serial)
{
struct usb_device *udev = serial->dev;
int latency = ndi_latency_timer;
- int rv = 0;
if (latency == 0)
latency = 1;
@@ -1627,7 +1626,8 @@ static int ftdi_NDI_device_setup(struct usb_serial *serial)
dbg("%s setting NDI device latency to %d", __func__, latency);
dev_info(&udev->dev, "NDI device with a latency value of %d", latency);
- rv = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ /* FIXME: errors are not returned */
+ usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
FTDI_SIO_SET_LATENCY_TIMER_REQUEST,
FTDI_SIO_SET_LATENCY_TIMER_REQUEST_TYPE,
latency, 0, NULL, 0, WDR_TIMEOUT);
@@ -1718,7 +1718,7 @@ static int ftdi_open(struct tty_struct *tty, struct usb_serial_port *port)
struct usb_device *dev = port->serial->dev;
struct ftdi_private *priv = usb_get_serial_port_data(port);
unsigned long flags;
- int result = 0;
+ int result;
dbg("%s", __func__);
@@ -2137,7 +2137,7 @@ static void ftdi_break_ctl(struct tty_struct *tty, int break_state)
{
struct usb_serial_port *port = tty->driver_data;
struct ftdi_private *priv = usb_get_serial_port_data(port);
- __u16 urb_value = 0;
+ __u16 urb_value;
/* break_state = -1 to turn on break, and 0 to turn off break */
/* see drivers/char/tty_io.c to see it used */
--
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