USB: mos7840: switch to generic get_icount implementation

Switch to the generic get_icount implementation.

Note that the interrupt counters will no longer be reset at open which
is in accordance with which how the other drivers work.

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

diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index 7af3d4206523eeb0937fe373dfd9fb9eace9add6..92feae6e88512cdefcf4cf3ffa353d9414a34344 100644 (file)
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -220,7 +220,6 @@ struct moschip_port {
        char open_ports;
        wait_queue_head_t wait_chase;   /* for handling sleeping while waiting for chase to finish */
        int delta_msr_cond;
-       struct async_icount icount;
        struct usb_serial_port *port;   /* loop back to the owner of this object */
 
        /* Offsets */
@@ -399,11 +398,10 @@ static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
        struct moschip_port *mos7840_port;
        struct async_icount *icount;
        mos7840_port = port;
-       icount = &mos7840_port->icount;
        if (new_msr &
            (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
             MOS_MSR_DELTA_CD)) {
-               icount = &mos7840_port->icount;
+               icount = &mos7840_port->port->icount;
 
                /* update input line counters */
                if (new_msr & MOS_MSR_DELTA_CTS)
@@ -434,7 +432,7 @@ static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
        }
 
        /* update input line counters */
-       icount = &port->icount;
+       icount = &port->port->icount;
        if (new_lsr & SERIAL_LSR_BI)
                icount->brk++;
        if (new_lsr & SERIAL_LSR_OE)
@@ -761,8 +759,8 @@ static void mos7840_bulk_in_callback(struct urb *urb)
                struct tty_port *tport = &mos7840_port->port->port;
                tty_insert_flip_string(tport, data, urb->actual_length);
                tty_flip_buffer_push(tport);
-               mos7840_port->icount.rx += urb->actual_length;
-               dev_dbg(&port->dev, "mos7840_port->icount.rx is %d:\n", mos7840_port->icount.rx);
+               port->icount.rx += urb->actual_length;
+               dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx);
        }
 
        if (!mos7840_port->read_urb) {
@@ -1113,17 +1111,12 @@ static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
        /* initialize our wait queues */
        init_waitqueue_head(&mos7840_port->wait_chase);
 
-       /* initialize our icount structure */
-       memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
-
        /* initialize our port settings */
        /* Must set to enable ints! */
        mos7840_port->shadowMCR = MCR_MASTER_IE;
        /* send a open port command */
        mos7840_port->open = 1;
        /* mos7840_change_port_settings(mos7840_port,old_termios); */
-       mos7840_port->icount.tx = 0;
-       mos7840_port->icount.rx = 0;
 
        return 0;
 }
@@ -1489,8 +1482,8 @@ static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
                goto exit;
        }
        bytes_sent = transfer_size;
-       mos7840_port->icount.tx += transfer_size;
-       dev_dbg(&port->dev, "mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
+       port->icount.tx += transfer_size;
+       dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx);
 exit:
        return bytes_sent;
 
@@ -2109,37 +2102,6 @@ static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
        return 0;
 }
 
-static int mos7840_get_icount(struct tty_struct *tty,
-                       struct serial_icounter_struct *icount)
-{
-       struct usb_serial_port *port = tty->driver_data;
-       struct moschip_port *mos7840_port;
-       struct async_icount cnow;
-       unsigned long flags;
-
-       mos7840_port = mos7840_get_port_private(port);
-
-       spin_lock_irqsave(&port->lock, flags);
-       cnow = mos7840_port->icount;
-       spin_unlock_irqrestore(&port->lock, flags);
-
-       icount->cts = cnow.cts;
-       icount->dsr = cnow.dsr;
-       icount->rng = cnow.rng;
-       icount->dcd = cnow.dcd;
-       icount->rx = cnow.rx;
-       icount->tx = cnow.tx;
-       icount->frame = cnow.frame;
-       icount->overrun = cnow.overrun;
-       icount->parity = cnow.parity;
-       icount->brk = cnow.brk;
-       icount->buf_overrun = cnow.buf_overrun;
-
-       dev_dbg(&port->dev, "%s TIOCGICOUNT RX=%d, TX=%d\n", __func__,
-               icount->rx, icount->tx);
-       return 0;
-}
-
 /*****************************************************************************
  * SerialIoctl
  *     this function handles any ioctl calls to the driver
@@ -2183,7 +2145,7 @@ static int mos7840_ioctl(struct tty_struct *tty,
        case TIOCMIWAIT:
                dev_dbg(&port->dev, "%s  TIOCMIWAIT\n", __func__);
                spin_lock_irqsave(&port->lock, flags);
-               cprev = mos7840_port->icount;
+               cprev = port->icount;
                spin_unlock_irqrestore(&port->lock, flags);
                while (1) {
                        /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
@@ -2201,7 +2163,7 @@ static int mos7840_ioctl(struct tty_struct *tty,
                                return -EIO;
 
                        spin_lock_irqsave(&port->lock, flags);
-                       cnow = mos7840_port->icount;
+                       cnow = port->icount;
                        spin_unlock_irqrestore(&port->lock, flags);
 
                        if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
@@ -2565,7 +2527,7 @@ static struct usb_serial_driver moschip7840_4port_device = {
        .break_ctl = mos7840_break,
        .tiocmget = mos7840_tiocmget,
        .tiocmset = mos7840_tiocmset,
-       .get_icount = mos7840_get_icount,
+       .get_icount = usb_serial_generic_get_icount,
        .port_probe = mos7840_port_probe,
        .port_remove = mos7840_port_remove,
        .read_bulk_callback = mos7840_bulk_in_callback,