USB: serial: clean up attribute permissions

Clean up the DEVICE_ATTR usage in the USB serial drivers, making them
more obvious as to the permissions that the sysfs files should be.

Note: ftdi_sio.c still has a DEVICE_ATTR() used, that will have to wait
until after 3.12-rc1 comes out when DEVICE_ATTR_WO() shows up in Linus's
tree.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/serial/bus.c

@@ -38,15 +38,14 @@ static int usb_serial_device_match(struct device *dev,
 	return 0;
 }
 
-static ssize_t show_port_number(struct device *dev,
+static ssize_t port_number_show(struct device *dev,
 				struct device_attribute *attr, char *buf)
 {
 	struct usb_serial_port *port = to_usb_serial_port(dev);
 
 	return sprintf(buf, "%d\n", port->port_number);
 }
-
-static DEVICE_ATTR(port_number, S_IRUGO, show_port_number, NULL);
+static DEVICE_ATTR_RO(port_number);
 
 static int usb_serial_device_probe(struct device *dev)
 {

drivers/usb/serial/ftdi_sio.c

@@ -1561,8 +1561,8 @@ static void ftdi_set_max_packet_size(struct usb_serial_port *port)
  * ***************************************************************************
  */
 
-static ssize_t show_latency_timer(struct device *dev,
-				struct device_attribute *attr, char *buf)
+static ssize_t latency_timer_show(struct device *dev,
+				  struct device_attribute *attr, char *buf)
 {
 	struct usb_serial_port *port = to_usb_serial_port(dev);
 	struct ftdi_private *priv = usb_get_serial_port_data(port);
@@ -1572,11 +1572,10 @@ static ssize_t show_latency_timer(struct device *dev,
 		return sprintf(buf, "%i\n", priv->latency);
 }
 
-
 /* Write a new value of the latency timer, in units of milliseconds. */
-static ssize_t store_latency_timer(struct device *dev,
-			struct device_attribute *attr, const char *valbuf,
-			size_t count)
+static ssize_t latency_timer_store(struct device *dev,
+				   struct device_attribute *attr,
+				   const char *valbuf, size_t count)
 {
 	struct usb_serial_port *port = to_usb_serial_port(dev);
 	struct ftdi_private *priv = usb_get_serial_port_data(port);
@@ -1589,6 +1588,7 @@ static ssize_t store_latency_timer(struct device *dev,
 		return -EIO;
 	return count;
 }
+static DEVICE_ATTR_RW(latency_timer);
 
 /* Write an event character directly to the FTDI register.  The ASCII
    value is in the low 8 bits, with the enable bit in the 9th bit. */
@@ -1616,9 +1616,6 @@ static ssize_t store_event_char(struct device *dev,
 
 	return count;
 }
-
-static DEVICE_ATTR(latency_timer, S_IWUSR | S_IRUGO, show_latency_timer,
-							store_latency_timer);
 static DEVICE_ATTR(event_char, S_IWUSR, NULL, store_event_char);
 
 static int create_sysfs_attrs(struct usb_serial_port *port)

drivers/usb/serial/io_ti.c

@@ -2484,7 +2484,7 @@ static int edge_port_remove(struct usb_serial_port *port)
 
 /* Sysfs Attributes */
 
-static ssize_t show_uart_mode(struct device *dev,
+static ssize_t uart_mode_show(struct device *dev,
 	struct device_attribute *attr, char *buf)
 {
 	struct usb_serial_port *port = to_usb_serial_port(dev);
@@ -2493,7 +2493,7 @@ static ssize_t show_uart_mode(struct device *dev,
 	return sprintf(buf, "%d\n", edge_port->bUartMode);
 }
 
-static ssize_t store_uart_mode(struct device *dev,
+static ssize_t uart_mode_store(struct device *dev,
 	struct device_attribute *attr, const char *valbuf, size_t count)
 {
 	struct usb_serial_port *port = to_usb_serial_port(dev);
@@ -2509,9 +2509,7 @@ static ssize_t store_uart_mode(struct device *dev,
 
 	return count;
 }
-
-static DEVICE_ATTR(uart_mode, S_IWUSR | S_IRUGO, show_uart_mode,
-							store_uart_mode);
+static DEVICE_ATTR_RW(uart_mode);
 
 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
 {

drivers/usb/serial/iuu_phoenix.c

@@ -1130,7 +1130,7 @@ static int iuu_vcc_set(struct usb_serial_port *port, unsigned int vcc)
  * Sysfs Attributes
  */
 
-static ssize_t show_vcc_mode(struct device *dev,
+static ssize_t vcc_mode_show(struct device *dev,
 	struct device_attribute *attr, char *buf)
 {
 	struct usb_serial_port *port = to_usb_serial_port(dev);
@@ -1139,7 +1139,7 @@ static ssize_t show_vcc_mode(struct device *dev,
 	return sprintf(buf, "%d\n", priv->vcc);
 }
 
-static ssize_t store_vcc_mode(struct device *dev,
+static ssize_t vcc_mode_store(struct device *dev,
 	struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct usb_serial_port *port = to_usb_serial_port(dev);
@@ -1163,9 +1163,7 @@ static ssize_t store_vcc_mode(struct device *dev,
 fail_store_vcc_mode:
 	return count;
 }
-
-static DEVICE_ATTR(vcc_mode, S_IRUSR | S_IWUSR, show_vcc_mode,
-	store_vcc_mode);
+static DEVICE_ATTR_RW(vcc_mode);
 
 static int iuu_create_sysfs_attrs(struct usb_serial_port *port)
 {