linux-kernel - RE: [PATCH 1/2] ASoC: da7213: Delete an error message for a failed memory allocation in da7213_fw_to

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Message-ID: <2E89032DDAA8B9408CB92943514A0337014C1B116F@SW-EX-MBX01.diasemi.com>
Date:   Fri, 24 Nov 2017 11:22:59 +0000
From:   Adam Thomson <Adam.Thomson.Opensource@...semi.com>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "Support Opensource" <Support.Opensource@...semi.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, Takashi Iwai <tiwai@...e.com>
CC:     LKML <linux-kernel@...r.kernel.org>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>
Subject: RE: [PATCH 1/2] ASoC: da7213: Delete an error message for a failed
 memory allocation in da7213_fw_to_pdata()

On 23 November 2017 17:33, SF Markus Elfring wrote:

> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Thu, 23 Nov 2017 17:56:54 +0100
> 
> Omit an extra message for a memory allocation failure in this function.

I'm not sure this is an extra message. We don't return -ENOMEM as a result of
this operation and probe won't fail on this. So does devm_kzalloc() print error
messages?

> This issue was detected by using the Coccinelle software.
> 
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>  sound/soc/codecs/da7213.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/sound/soc/codecs/da7213.c b/sound/soc/codecs/da7213.c
> index 41d9b1da27c2..d1b77a0e3b74 100644
> --- a/sound/soc/codecs/da7213.c
> +++ b/sound/soc/codecs/da7213.c
> @@ -1654,10 +1654,8 @@ static struct da7213_platform_data
>  	u32 fw_val32;
> 
>  	pdata = devm_kzalloc(codec->dev, sizeof(*pdata), GFP_KERNEL);
> -	if (!pdata) {
> -		dev_warn(codec->dev, "Failed to allocate memory for pdata\n");
> +	if (!pdata)
>  		return NULL;
> -	}
> 
>  	if (device_property_read_u32(dev, "dlg,micbias1-lvl", &fw_val32) >= 0)
>  		pdata->micbias1_lvl = da7213_of_micbias_lvl(codec, fw_val32);
> --
> 2.15.0