* [PATCH] staging: comedi: drivers: rtd520: Removed variables that is never used
@ 2015-01-28 22:38 Rickard Strandqvist
2015-01-29 15:30 ` Ian Abbott
0 siblings, 1 reply; 2+ messages in thread
From: Rickard Strandqvist @ 2015-01-28 22:38 UTC (permalink / raw)
To: Ian Abbott, H Hartley Sweeten
Cc: Rickard Strandqvist, Greg Kroah-Hartman, devel, linux-kernel
Variable ar assigned a value that is never used.
I have also removed all the code that thereby serves no purpose.
This was found using a static code analysis program called cppcheck
Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
---
drivers/staging/comedi/drivers/rtd520.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/staging/comedi/drivers/rtd520.c b/drivers/staging/comedi/drivers/rtd520.c
index 581aa58..305631c 100644
--- a/drivers/staging/comedi/drivers/rtd520.c
+++ b/drivers/staging/comedi/drivers/rtd520.c
@@ -1031,8 +1031,6 @@ static int rtd_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
static int rtd_ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
{
struct rtd_private *devpriv = dev->private;
- u32 overrun;
- u16 status;
/* pacer stop source: SOFTWARE */
writel(0, dev->mmio + LAS0_PACER_STOP);
@@ -1040,8 +1038,8 @@ static int rtd_ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
writel(0, dev->mmio + LAS0_ADC_CONVERSION);
writew(0, dev->mmio + LAS0_IT);
devpriv->ai_count = 0; /* stop and don't transfer any more */
- status = readw(dev->mmio + LAS0_IT);
- overrun = readl(dev->mmio + LAS0_OVERRUN) & 0xffff;
+ readw(dev->mmio + LAS0_IT);
+ readl(dev->mmio + LAS0_OVERRUN) & 0xffff;
writel(0, dev->mmio + LAS0_ADC_FIFO_CLEAR);
return 0;
}
--
1.7.10.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] staging: comedi: drivers: rtd520: Removed variables that is never used
2015-01-28 22:38 [PATCH] staging: comedi: drivers: rtd520: Removed variables that is never used Rickard Strandqvist
@ 2015-01-29 15:30 ` Ian Abbott
0 siblings, 0 replies; 2+ messages in thread
From: Ian Abbott @ 2015-01-29 15:30 UTC (permalink / raw)
To: Rickard Strandqvist, H Hartley Sweeten
Cc: Greg Kroah-Hartman, devel, linux-kernel
On 28/01/15 22:38, Rickard Strandqvist wrote:
> Variable ar assigned a value that is never used.
> I have also removed all the code that thereby serves no purpose.
>
> This was found using a static code analysis program called cppcheck
>
> Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
> ---
> drivers/staging/comedi/drivers/rtd520.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/staging/comedi/drivers/rtd520.c b/drivers/staging/comedi/drivers/rtd520.c
> index 581aa58..305631c 100644
> --- a/drivers/staging/comedi/drivers/rtd520.c
> +++ b/drivers/staging/comedi/drivers/rtd520.c
> @@ -1031,8 +1031,6 @@ static int rtd_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
> static int rtd_ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
> {
> struct rtd_private *devpriv = dev->private;
> - u32 overrun;
> - u16 status;
>
> /* pacer stop source: SOFTWARE */
> writel(0, dev->mmio + LAS0_PACER_STOP);
> @@ -1040,8 +1038,8 @@ static int rtd_ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
> writel(0, dev->mmio + LAS0_ADC_CONVERSION);
> writew(0, dev->mmio + LAS0_IT);
> devpriv->ai_count = 0; /* stop and don't transfer any more */
> - status = readw(dev->mmio + LAS0_IT);
> - overrun = readl(dev->mmio + LAS0_OVERRUN) & 0xffff;
> + readw(dev->mmio + LAS0_IT);
> + readl(dev->mmio + LAS0_OVERRUN) & 0xffff;
The ' & 0xffff' part produces compiler warnings.
Those two lines can be removed. The values read were previously only
used in a kernel log message.
> writel(0, dev->mmio + LAS0_ADC_FIFO_CLEAR);
> return 0;
> }
>
--
-=( Ian Abbott @ MEV Ltd. E-mail: <abbotti@mev.co.uk> )=-
-=( Web: http://www.mev.co.uk/ )=-
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