staging: comedi: rtd520: remove dioStatus from private data

This variable in the private data is not necessary. Remove it.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/rtd520.c b/drivers/staging/comedi/drivers/rtd520.c
index 007d3a6..43b8ceb 100644 (file)
--- a/drivers/staging/comedi/drivers/rtd520.c
+++ b/drivers/staging/comedi/drivers/rtd520.c
@@ -417,7 +417,6 @@ struct rtdPrivate {
        u16 intMask;            /* interrupt mask */
        u16 intClearMask;       /* interrupt clear mask */
        u8 utcCtrl[4];          /* crtl mode for 3 utc + read back */
-       u8 dioStatus;           /* could be read back (dio0Ctrl) */
        unsigned fifoLen;
 };
 
@@ -1292,11 +1291,13 @@ static int rtd_dio_insn_config(struct comedi_device *dev,
        }
 
        /* TODO support digital match interrupts and strobes */
-       devpriv->dioStatus = 0x01;      /* set direction */
-       writew(devpriv->dioStatus, devpriv->las0 + LAS0_DIO_STATUS);
+
+       /* set direction */
+       writew(0x01, devpriv->las0 + LAS0_DIO_STATUS);
        writew(s->io_bits & 0xff, devpriv->las0 + LAS0_DIO0_CTRL);
-       devpriv->dioStatus = 0x00;      /* clear interrupts */
-       writew(devpriv->dioStatus, devpriv->las0 + LAS0_DIO_STATUS);
+
+       /* clear interrupts */
+       writew(0x00, devpriv->las0 + LAS0_DIO_STATUS);
 
        /* port1 can only be all input or all output */
 
@@ -1335,8 +1336,7 @@ static void rtd_init_board(struct comedi_device *dev)
        writel(0, devpriv->las0 + LAS0_DAC1_RESET);
        writel(0, devpriv->las0 + LAS0_DAC2_RESET);
        /* clear digital IO fifo */
-       devpriv->dioStatus = 0;
-       writew(devpriv->dioStatus, devpriv->las0 + LAS0_DIO_STATUS);
+       writew(0, devpriv->las0 + LAS0_DIO_STATUS);
        devpriv->utcCtrl[0] = (0 << 6) | 0x30;
        devpriv->utcCtrl[1] = (1 << 6) | 0x30;
        devpriv->utcCtrl[2] = (2 << 6) | 0x30;