USB: cypress_m8: replace custom ioctl operation with tiocmiwait

Replace custom ioctl operation with tiocmiwait.

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

diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c
index ba7352e..cdbb096 100644 (file)
--- a/drivers/usb/serial/cypress_m8.c
+++ b/drivers/usb/serial/cypress_m8.c
@@ -129,13 +129,12 @@ static int  cypress_write(struct tty_struct *tty, struct usb_serial_port *port,
                        const unsigned char *buf, int count);
 static void cypress_send(struct usb_serial_port *port);
 static int  cypress_write_room(struct tty_struct *tty);
-static int  cypress_ioctl(struct tty_struct *tty,
-                       unsigned int cmd, unsigned long arg);
 static void cypress_set_termios(struct tty_struct *tty,
                        struct usb_serial_port *port, struct ktermios *old);
 static int  cypress_tiocmget(struct tty_struct *tty);
 static int  cypress_tiocmset(struct tty_struct *tty,
                        unsigned int set, unsigned int clear);
+static int  cypress_tiocmiwait(struct tty_struct *tty, unsigned long arg);
 static int  cypress_chars_in_buffer(struct tty_struct *tty);
 static void cypress_throttle(struct tty_struct *tty);
 static void cypress_unthrottle(struct tty_struct *tty);
@@ -158,10 +157,10 @@ static struct usb_serial_driver cypress_earthmate_device = {
        .dtr_rts =                      cypress_dtr_rts,
        .write =                        cypress_write,
        .write_room =                   cypress_write_room,
-       .ioctl =                        cypress_ioctl,
        .set_termios =                  cypress_set_termios,
        .tiocmget =                     cypress_tiocmget,
        .tiocmset =                     cypress_tiocmset,
+       .tiocmiwait =                   cypress_tiocmiwait,
        .chars_in_buffer =              cypress_chars_in_buffer,
        .throttle =                     cypress_throttle,
        .unthrottle =                   cypress_unthrottle,
@@ -184,10 +183,10 @@ static struct usb_serial_driver cypress_hidcom_device = {
        .dtr_rts =                      cypress_dtr_rts,
        .write =                        cypress_write,
        .write_room =                   cypress_write_room,
-       .ioctl =                        cypress_ioctl,
        .set_termios =                  cypress_set_termios,
        .tiocmget =                     cypress_tiocmget,
        .tiocmset =                     cypress_tiocmset,
+       .tiocmiwait =                   cypress_tiocmiwait,
        .chars_in_buffer =              cypress_chars_in_buffer,
        .throttle =                     cypress_throttle,
        .unthrottle =                   cypress_unthrottle,
@@ -210,10 +209,10 @@ static struct usb_serial_driver cypress_ca42v2_device = {
        .dtr_rts =                      cypress_dtr_rts,
        .write =                        cypress_write,
        .write_room =                   cypress_write_room,
-       .ioctl =                        cypress_ioctl,
        .set_termios =                  cypress_set_termios,
        .tiocmget =                     cypress_tiocmget,
        .tiocmset =                     cypress_tiocmset,
+       .tiocmiwait =                   cypress_tiocmiwait,
        .chars_in_buffer =              cypress_chars_in_buffer,
        .throttle =                     cypress_throttle,
        .unthrottle =                   cypress_unthrottle,
@@ -855,55 +854,43 @@ static int cypress_tiocmset(struct tty_struct *tty,
 }
 
 
-static int cypress_ioctl(struct tty_struct *tty,
-                                       unsigned int cmd, unsigned long arg)
+static int cypress_tiocmiwait(struct tty_struct *tty, unsigned long arg)
 {
        struct usb_serial_port *port = tty->driver_data;
        struct cypress_private *priv = usb_get_serial_port_data(port);
-
-       dev_dbg(&port->dev, "%s - port %d, cmd 0x%.4x\n", __func__, port->number, cmd);
-
-       switch (cmd) {
-       /* This code comes from drivers/char/serial.c and ftdi_sio.c */
-       case TIOCMIWAIT:
-               for (;;) {
-                       interruptible_sleep_on(&port->delta_msr_wait);
-                       /* see if a signal did it */
-                       if (signal_pending(current))
-                               return -ERESTARTSYS;
-
-                       if (port->serial->disconnected)
-                               return -EIO;
-
-                       {
-                               char diff = priv->diff_status;
-                               if (diff == 0)
-                                       return -EIO; /* no change => error */
-
-                               /* consume all events */
-                               priv->diff_status = 0;
-
-                               /* return 0 if caller wanted to know about
-                                  these bits */
-                               if (((arg & TIOCM_RNG) && (diff & UART_RI)) ||
-                                   ((arg & TIOCM_DSR) && (diff & UART_DSR)) ||
-                                   ((arg & TIOCM_CD) && (diff & UART_CD)) ||
-                                   ((arg & TIOCM_CTS) && (diff & UART_CTS)))
-                                       return 0;
-                               /* otherwise caller can't care less about what
-                                * happened, and so we continue to wait for
-                                * more events.
-                                */
-                       }
-               }
-               return 0;
-       default:
-               break;
+       char diff;
+
+       for (;;) {
+               interruptible_sleep_on(&port->delta_msr_wait);
+               /* see if a signal did it */
+               if (signal_pending(current))
+                       return -ERESTARTSYS;
+
+               if (port->serial->disconnected)
+                       return -EIO;
+
+               diff = priv->diff_status;
+               if (diff == 0)
+                       return -EIO; /* no change => error */
+
+               /* consume all events */
+               priv->diff_status = 0;
+
+               /* return 0 if caller wanted to know about
+                  these bits */
+               if (((arg & TIOCM_RNG) && (diff & UART_RI))  ||
+                       ((arg & TIOCM_DSR) && (diff & UART_DSR)) ||
+                       ((arg & TIOCM_CD)  && (diff & UART_CD))  ||
+                       ((arg & TIOCM_CTS) && (diff & UART_CTS)))
+                       return 0;
+               /* otherwise caller can't care less about what
+                * happened, and so we continue to wait for
+                * more events.
+                */
        }
-       dev_dbg(&port->dev, "%s - arg not supported - it was 0x%04x - check include/asm/ioctls.h\n", __func__, cmd);
-       return -ENOIOCTLCMD;
-} /* cypress_ioctl */
 
+       return 0;
+}
 
 static void cypress_set_termios(struct tty_struct *tty,
        struct usb_serial_port *port, struct ktermios *old_termios)