linux-kernel - Re: [PATCH] [media] tw686x: add a missing newline when printing parameter 'dma

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Date:   Thu, 14 May 2020 09:32:40 +0800
From:   Xiongfeng Wang <wangxiongfeng2@...wei.com>
To:     Ezequiel Garcia <ezequiel@...guardiasur.com.ar>
CC:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media <linux-media@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] [media] tw686x: add a missing newline when printing
 parameter 'dma_mode'

Hi Ezequiel,

Thanks for your reply !

On 2020/5/14 3:32, Ezequiel Garcia wrote:
> On Mon, 11 May 2020 at 05:49, Xiongfeng Wang <wangxiongfeng2@...wei.com> wrote:
>>
>> When I cat module parameter 'dma_mode' by sysfs, it displays as follows.
>> It is better to add a newline for easy reading.
>>
>> [root@...k-202 ~]# cat /sys/module/tw686x/parameters/dma_mode
>> memcpy[root@...k-202 ~]#
>>
>> Signed-off-by: Xiongfeng Wang <wangxiongfeng2@...wei.com>
> 
> I don't mind this change, but I don't think this is standard.
> The lack of newline follows what other drivers are doing.
> 
> # hexdump -c /sys/module/acpi/parameters/ec_event_clearing
> 0000000   q   u   e   r   y
> 0000005
> 
> Is it really an issue for you?

It's not an issue for me. It's just that if the result is in a separate line, it
reads more easily. I am also planning to fix the parameters below
'/sys/module/acpi/parameters'.

Thanks,
Xiongfeng

> 
> Thanks,
> Ezequiel
> 
>> ---
>>  drivers/media/pci/tw686x/tw686x-core.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/media/pci/tw686x/tw686x-core.c b/drivers/media/pci/tw686x/tw686x-core.c
>> index 74ae4f0..bfc61da 100644
>> --- a/drivers/media/pci/tw686x/tw686x-core.c
>> +++ b/drivers/media/pci/tw686x/tw686x-core.c
>> @@ -71,7 +71,7 @@ static const char *dma_mode_name(unsigned int mode)
>>
>>  static int tw686x_dma_mode_get(char *buffer, const struct kernel_param *kp)
>>  {
>> -       return sprintf(buffer, "%s", dma_mode_name(dma_mode));
>> +       return sprintf(buffer, "%s\n", dma_mode_name(dma_mode));
>>  }
>>
>>  static int tw686x_dma_mode_set(const char *val, const struct kernel_param *kp)
>> --
>> 1.7.12.4
>>
>