diff options
| author | H Hartley Sweeten <hsweeten@visionengravers.com> | 2013-08-30 11:06:58 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-09-17 07:47:41 -0700 |
| commit | 6f617e544b26d4232659402da42924e8cd6b1eaf (patch) | |
| tree | 008a583d52d6d905627521e6714ccfb5b31911a8 /drivers/staging/comedi/drivers/vmk80xx.c | |
| parent | 6171667a81fd650082c83df1d417e152686483ab (diff) | |
staging: comedi: vmk80xx: use comedi_dio_update_state()
Use comedi_dio_update_state() to handle the boilerplate code to update
the subdevice s->state.
Tidy up the vmk80xx_do_insn_bits() function a bit.
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>
Diffstat (limited to 'drivers/staging/comedi/drivers/vmk80xx.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/vmk80xx.c | 35 |
1 files changed, 13 insertions, 22 deletions
diff --git a/drivers/staging/comedi/drivers/vmk80xx.c b/drivers/staging/comedi/drivers/vmk80xx.c index 06efa16b9af2..933b01a0f03d 100644 --- a/drivers/staging/comedi/drivers/vmk80xx.c +++ b/drivers/staging/comedi/drivers/vmk80xx.c @@ -462,9 +462,10 @@ static int vmk80xx_do_insn_bits(struct comedi_device *dev, unsigned int *data) { struct vmk80xx_private *devpriv = dev->private; - unsigned char *rx_buf, *tx_buf; + unsigned char *rx_buf = devpriv->usb_rx_buf; + unsigned char *tx_buf = devpriv->usb_tx_buf; int reg, cmd; - int retval; + int ret; if (devpriv->model == VMK8061_MODEL) { reg = VMK8061_DO_REG; @@ -476,37 +477,27 @@ static int vmk80xx_do_insn_bits(struct comedi_device *dev, down(&devpriv->limit_sem); - rx_buf = devpriv->usb_rx_buf; - tx_buf = devpriv->usb_tx_buf; - - if (data[0]) { - tx_buf[reg] &= ~data[0]; - tx_buf[reg] |= (data[0] & data[1]); - - retval = vmk80xx_write_packet(dev, cmd); - - if (retval) + if (comedi_dio_update_state(s, data)) { + tx_buf[reg] = s->state; + ret = vmk80xx_write_packet(dev, cmd); + if (ret) goto out; } if (devpriv->model == VMK8061_MODEL) { tx_buf[0] = VMK8061_CMD_RD_DO; - - retval = vmk80xx_read_packet(dev); - - if (!retval) { - data[1] = rx_buf[reg]; - retval = 2; - } + ret = vmk80xx_read_packet(dev); + if (ret) + goto out; + data[1] = rx_buf[reg]; } else { - data[1] = tx_buf[reg]; - retval = 2; + data[1] = s->state; } out: up(&devpriv->limit_sem); - return retval; + return ret ? ret : insn->n; } static int vmk80xx_cnt_insn_read(struct comedi_device *dev, |