Re: [PATCH -next] staging: comedi: dt2814: remove set but not used variables 'data'

[Ian Abbott]

On 23/10/2019 08:48, YueHaibing wrote:
> drivers/staging/comedi/drivers/dt2814.c:193:6:
>   warning: variable data set but not used [-Wunused-but-set-variable]
>
> It is never used, so can be removed.
>
> Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
> ---
>   drivers/staging/comedi/drivers/dt2814.c | 8 ++------
>   1 file changed, 2 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/staging/comedi/drivers/dt2814.c b/drivers/staging/comedi/drivers/dt2814.c
> index d2c7157..e7c6787 100644
> --- a/drivers/staging/comedi/drivers/dt2814.c
> +++ b/drivers/staging/comedi/drivers/dt2814.c
> @@ -186,21 +186,17 @@ static int dt2814_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
>   
>   static irqreturn_t dt2814_interrupt(int irq, void *d)
>   {
> -	int lo, hi;
>   	struct comedi_device *dev = d;
>   	struct dt2814_private *devpriv = dev->private;
>   	struct comedi_subdevice *s = dev->read_subdev;
> -	int data;
>   
>   	if (!dev->attached) {
>   		dev_err(dev->class_dev, "spurious interrupt\n");
>   		return IRQ_HANDLED;
>   	}
>   
> -	hi = inb(dev->iobase + DT2814_DATA);
> -	lo = inb(dev->iobase + DT2814_DATA);
> -
> -	data = (hi << 4) | (lo >> 4);
> +	inb(dev->iobase + DT2814_DATA);
> +	inb(dev->iobase + DT2814_DATA);
>   
>   	if (!(--devpriv->ntrig)) {
>   		int i;

Those variables are currently unused due to a bug that I need to fix.


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