linux-kernel - Re: [PATCH 48/57] staging: comedi: drivers: jr3_pci: Remove set but unused variable 'min_full

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Date:   Thu, 15 Apr 2021 10:33:26 +0100
From:   Ian Abbott <abbotti@....co.uk>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     linux-kernel@...r.kernel.org,
        H Hartley Sweeten <hsweeten@...ionengravers.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Alexander A. Klimov" <grandmaster@...klimov.de>,
        Anders Blomdell <anders.blomdell@...trol.lth.se>,
        linux-staging@...ts.linux.dev
Subject: Re: [PATCH 48/57] staging: comedi: drivers: jr3_pci: Remove set but
 unused variable 'min_full_scale'

On 14/04/2021 19:11, Lee Jones wrote:
> Fixes the following W=1 kernel build warning(s):
> 
>   drivers/staging/comedi/drivers/jr3_pci.c: In function ‘jr3_pci_poll_subdevice’:
>   drivers/staging/comedi/drivers/jr3_pci.c:507:22: warning: variable ‘min_full_scale’ set but not used [-Wunused-but-set-variable]
> 
> Cc: Ian Abbott <abbotti@....co.uk>
> Cc: H Hartley Sweeten <hsweeten@...ionengravers.com>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: "Alexander A. Klimov" <grandmaster@...klimov.de>
> Cc: Anders Blomdell <anders.blomdell@...trol.lth.se>
> Cc: linux-staging@...ts.linux.dev
> Signed-off-by: Lee Jones <lee.jones@...aro.org>
> ---
>   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 7a02c4fa3cda8..afa2f8d5c8c0c 100644
> --- a/drivers/staging/comedi/drivers/jr3_pci.c
> +++ b/drivers/staging/comedi/drivers/jr3_pci.c
> @@ -504,10 +504,9 @@ jr3_pci_poll_subdevice(struct comedi_subdevice *s)
>   			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(sensor);
> +			get_min_full_scales(sensor);
>   			max_full_scale = get_max_full_scales(sensor);
>   			set_full_scales(sensor, max_full_scale);
>   
> 

get_min_full_scales() could be removed altogether.  It was only being 
called originally so the driver could printk the values, but those 
printks have since been removed.

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