linux-kernel - Re: [PATCH -next v2] staging: comedi: Remove unused variable ‘min_full_scale’ and function 'get_min_full

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Message-ID: <a21ada45-8eb8-88b7-7634-096487efc81e@huawei.com>
Date:   Wed, 19 May 2021 09:07:16 +0800
From:   Bixuan Cui <cuibixuan@...wei.com>
To:     Ian Abbott <abbotti@....co.uk>, <linux-kernel@...r.kernel.org>
CC:     <hsweeten@...ionengravers.com>, <gregkh@...uxfoundation.org>,
        <grandmaster@...klimov.de>
Subject: Re: [PATCH -next v2] staging: comedi: Remove unused variable ‘min_full_scale’ and function 'get_min_full_scales'



On 2021/5/17 17:44, Ian Abbott wrote:
> On 14/05/2021 09:52, Bixuan Cui wrote:
>> The variable ‘min_full_scale’ and function 'get_min_full_scales' are
>> not used, So delete them.
>>
>> Signed-off-by: Bixuan Cui <cuibixuan@...wei.com>
>> ---
>> Changes from v2:
>> * Delete function 'get_min_full_scales'
>>
>>   drivers/comedi/drivers/jr3_pci.c | 15 ---------------
>>   1 file changed, 15 deletions(-)
>>
>> diff --git a/drivers/comedi/drivers/jr3_pci.c b/drivers/comedi/drivers/jr3_pci.c
>> index 7a02c4fa3cda..f963080dd61f 100644
>> --- a/drivers/comedi/drivers/jr3_pci.c
>> +++ b/drivers/comedi/drivers/jr3_pci.c
>> @@ -186,19 +186,6 @@ static void set_full_scales(struct jr3_sensor __iomem *sensor,
>>       set_s16(&sensor->command_word0, 0x0a00);
>>   }
>>   -static struct six_axis_t get_min_full_scales(struct jr3_sensor __iomem *sensor)
>> -{
>> -    struct six_axis_t result;
>> -
>> -    result.fx = get_s16(&sensor->min_full_scale.fx);
>> -    result.fy = get_s16(&sensor->min_full_scale.fy);
>> -    result.fz = get_s16(&sensor->min_full_scale.fz);
>> -    result.mx = get_s16(&sensor->min_full_scale.mx);
>> -    result.my = get_s16(&sensor->min_full_scale.my);
>> -    result.mz = get_s16(&sensor->min_full_scale.mz);
>> -    return result;
>> -}
>> -
>>   static struct six_axis_t get_max_full_scales(struct jr3_sensor __iomem *sensor)
>>   {
>>       struct six_axis_t result;
>> @@ -504,10 +491,8 @@ 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);
>>               max_full_scale = get_max_full_scales(sensor);
>>               set_full_scales(sensor, max_full_scale);
>>  
> 
> I'm pretty sure this is OK.  The min_full_scale registers are just informational.  The driver used to print the values, but not since commit a1d16659538a ("staging: comedi: jr3_pci: remove noisy printk") so this code is now redundant.
Thanks for your reply.

Thanks
Bixuan Cui

> 
> Reviewed-by: Ian Abbott <abbotti@....co.uk>
>