linux-kernel - Re: [PATCH] drm/etnaviv: remove check for return value of drm

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Message-ID: <alpine.LNX.2.21.99999.375.2002182102230.20178@wambui>
Date:   Tue, 18 Feb 2020 21:02:56 +0300 (EAT)
From:   Wambui Karuga <wambui.karugax@...il.com>
To:     Lucas Stach <l.stach@...gutronix.de>
cc:     Wambui Karuga <wambui.karugax@...il.com>,
        linux+etnaviv@...linux.org.uk, christian.gmeiner@...il.com,
        airlied@...ux.ie, daniel@...ll.ch, etnaviv@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        gregkh@...uxfoundation.org
Subject: Re: [PATCH] drm/etnaviv: remove check for return value of drm_debugfs
 function



On Tue, 18 Feb 2020, Lucas Stach wrote:

> On Di, 2020-02-18 at 20:28 +0300, Wambui Karuga wrote:
>> As there is no need to check the return value if
>> drm_debugfs_create_files,
>
> And here is where the commit message skips a very important
> information: Since 987d65d01356 (drm: debugfs: make
> drm_debugfs_create_files() never fail) this function never returns
> anything other than 0, so there is no point in checking. This
> information should be in the commit message, so the reviewer doesn't
> need to look up this fact in the git history.
>
Okay, I can add that to the commit message and resend.
Thanks.

> Regards,
> Lucas
>
>>  remove the check and error handling in
>> etnaviv_debugfs_init and have the function return 0 directly.
>>
>> Signed-off-by: Wambui Karuga <wambui.karugax@...il.com>
>> ---
>>  drivers/gpu/drm/etnaviv/etnaviv_drv.c | 16 ++++------------
>>  1 file changed, 4 insertions(+), 12 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
>> b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
>> index 6b43c1c94e8f..a65d30a48a9d 100644
>> --- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
>> +++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
>> @@ -233,19 +233,11 @@ static struct drm_info_list
>> etnaviv_debugfs_list[] = {
>>
>>  static int etnaviv_debugfs_init(struct drm_minor *minor)
>>  {
>> -	struct drm_device *dev = minor->dev;
>> -	int ret;
>> -
>> -	ret = drm_debugfs_create_files(etnaviv_debugfs_list,
>> -			ARRAY_SIZE(etnaviv_debugfs_list),
>> -			minor->debugfs_root, minor);
>> +	drm_debugfs_create_files(etnaviv_debugfs_list,
>> +				 ARRAY_SIZE(etnaviv_debugfs_list),
>> +				 minor->debugfs_root, minor);
>>
>> -	if (ret) {
>> -		dev_err(dev->dev, "could not install
>> etnaviv_debugfs_list\n");
>> -		return ret;
>> -	}
>> -
>> -	return ret;
>> +	return 0;
>>  }
>>  #endif
>>
>
>