linux-kernel - Re: [PATCH -next] ASoC: sun4i-codec: Fix error return code in sun4i_codec

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Date:	Thu, 11 Aug 2016 22:15:27 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	Chen-Yu Tsai <wens@...e.org>
Cc:	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
	Emilio Lopez <emilio@...pez.com.ar>,
	Hans De Goede <hdegoede@...hat.com>, ats@...og.org,
	fengguang.wu@...el.com, Linux-ALSA <alsa-devel@...a-project.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -next] ASoC: sun4i-codec: Fix error return code in
 sun4i_codec_probe()

Hi

On 08/10/2016 10:04 PM, Chen-Yu Tsai wrote:
> On Wed, Aug 10, 2016 at 9:42 PM, Wei Yongjun <weiyj.lk@...il.com> wrote:
>> Fix to return error code -ENOMEM instead of 0 when create card
>> failed, as done elsewhere in this function.
>>
>> Fixes: 45fb6b6f2aa3 ("ASoC: sunxi: add support for the on-chip
>> codec on early Allwinner SoCs")
>> Signed-off-by: Wei Yongjun <weiyj.lk@...il.com>
>> ---
>>  sound/soc/sunxi/sun4i-codec.c | 1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/sound/soc/sunxi/sun4i-codec.c b/sound/soc/sunxi/sun4i-codec.c
>> index 0e19c50..e741659 100644
>> --- a/sound/soc/sunxi/sun4i-codec.c
>> +++ b/sound/soc/sunxi/sun4i-codec.c
>> @@ -846,6 +846,7 @@ static int sun4i_codec_probe(struct platform_device *pdev)
>>         card = sun4i_codec_create_card(&pdev->dev);
>>         if (!card) {
>>                 dev_err(&pdev->dev, "Failed to create our card\n");
>> +               ret = -ENOMEM;
>>                 goto err_unregister_codec;
>>         }
>>
> This works, though it might be better to fix the create_card function and
> any custom functions called in there to pass back a proper error value.
>
Since sun4i_codec_create_card() can only failed when kmalloc() return NULL, so
still need to change sun4i_codec_create_card()?