linux-kernel - Re: [PATCH] staging: comedi: drivers: jr3_pci: Removed variables that is never used

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Message-ID: <54CA4309.4050807@mev.co.uk>
Date:	Thu, 29 Jan 2015 14:26:17 +0000
From:	Ian Abbott <abbotti@....co.uk>
To:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
	H Hartley Sweeten <hsweeten@...ionengravers.com>
CC:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Vladimir A. Nazarenko" <naszar@...ru>, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: comedi: drivers: jr3_pci: Removed variables
 that is never used

On 28/01/15 22:35, 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@...ctrumdigital.se>
> ---
>   drivers/staging/comedi/drivers/jr3_pci.c |    3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/staging/comedi/drivers/jr3_pci.c b/drivers/staging/comedi/drivers/jr3_pci.c
> index 81fab2d..5d4cca7 100644
> --- a/drivers/staging/comedi/drivers/jr3_pci.c
> +++ b/drivers/staging/comedi/drivers/jr3_pci.c
> @@ -520,10 +520,9 @@ static struct jr3_pci_poll_delay jr3_pci_poll_subdevice(struct comedi_subdevice
>   			result = poll_delay_min_max(20, 100);
>   		} else {
>   			/* Set full scale */
> -			struct six_axis_t min_full_scale;
>   			struct six_axis_t max_full_scale;
>
> -			min_full_scale = get_min_full_scales(channel);
> +			get_min_full_scales(channel);
>   			max_full_scale = get_max_full_scales(channel);
>   			set_full_scales(channel, max_full_scale);
>
>

Yes, it doesn't appear to be needed.  The driver used to have some 
kernel logs that output the min and max full scale information, but it 
didn't do anything else with min_full_scale.

The call to get_min_full_scales() and the function itself can also be 
removed.

-- 
-=( Ian Abbott @ MEV Ltd.    E-mail: <abbotti@....co.uk> )=-
-=(                          Web: http://www.mev.co.uk/  )=-
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