linux-kernel - Re: [PATCH] media: s5p-mfc remove unnecessary error messages

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Date:	Thu, 14 Jul 2016 08:46:34 -0400
From:	Javier Martinez Canillas <javier@....samsung.com>
To:	Shuah Khan <shuahkh@....samsung.com>, kyungmin.park@...sung.com,
	k.debski@...sung.com, jtp.park@...sung.com, mchehab@...nel.org
Cc:	linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] media: s5p-mfc remove unnecessary error messages

Hello Shuah,

On 07/12/2016 08:33 PM, Shuah Khan wrote:
> Removing unnecessary error messages as appropriate error code is returned.
> 
> Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
> ---
>  drivers/media/platform/s5p-mfc/s5p_mfc.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c
> index b6fde20..906f80c 100644
> --- a/drivers/media/platform/s5p-mfc/s5p_mfc.c
> +++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c
> @@ -759,7 +759,6 @@ static int s5p_mfc_open(struct file *file)
>  	/* Allocate memory for context */
>  	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
>  	if (!ctx) {
> -		mfc_err("Not enough memory\n");

I agree to remove this since in case of a OOM, the core already does a
stack dump and prints an error message so there's no need to it here.

>  		ret = -ENOMEM;
>  		goto err_alloc;
>  	}
> @@ -776,7 +775,6 @@ static int s5p_mfc_open(struct file *file)
>  	while (dev->ctx[ctx->num]) {
>  		ctx->num++;
>  		if (ctx->num >= MFC_NUM_CONTEXTS) {
> -			mfc_err("Too many open contexts\n");

But I think this error message shouldn't be removed since explains why
the open failed, even when an error code is returned.

>  			ret = -EBUSY;
>  			goto err_no_ctx;
>  		}
> 

Best regards,
-- 
Javier Martinez Canillas
Open Source Group
Samsung Research America