linux-kernel - Re: [PATCH 3/9] ASoC: Intel: bytcr_wm5102: use GFP

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Date:   Fri, 11 Feb 2022 08:43:09 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Julia Lawall <Julia.Lawall@...ia.fr>,
        Cezary Rojewski <cezary.rojewski@...el.com>
Cc:     alsa-devel@...a-project.org, kernel-janitors@...r.kernel.org,
        Takashi Iwai <tiwai@...e.com>,
        Jie Yang <yang.jie@...ux.intel.com>,
        Liam Girdwood <liam.r.girdwood@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/9] ASoC: Intel: bytcr_wm5102: use GFP_KERNEL

Hi,

On 2/11/22 01:20, Pierre-Louis Bossart wrote:
> 
> 
> On 2/10/22 14:42, Julia Lawall wrote:
>> Platform_driver probe functions aren't called with locks held
>> and thus don't need GFP_ATOMIC. Use GFP_KERNEL instead.
>>
>> Problem found with Coccinelle.
> 
> Thanks Julia, indeed it's the only case where GFP_ATOMIC is used for
> machine drivers.
> 
> This was already present in the initial Android driver from Intel (2013)
> [1] and missed in the multiple passes to get this upstream.
> 
> Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>

Yeah I should have caught this when I upstreamed the machine driver:

Reviewed-by: Hans de Goede <hdegoede@...hat.com>

Regards,

Hans



> 
> [1]
> https://github.com/lenovo-yt2-dev/android_kernel_lenovo_baytrail/blob/cm-12.1/sound/soc/intel/board/byt_bl_wm5102.c
> 
>>
>> Signed-off-by: Julia Lawall <Julia.Lawall@...ia.fr>
>>
>> ---
>>  sound/soc/intel/boards/bytcr_wm5102.c |    2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/sound/soc/intel/boards/bytcr_wm5102.c b/sound/soc/intel/boards/bytcr_wm5102.c
>> index 504ef4cab111..8d8e96e3cd2d 100644
>> --- a/sound/soc/intel/boards/bytcr_wm5102.c
>> +++ b/sound/soc/intel/boards/bytcr_wm5102.c
>> @@ -389,7 +389,7 @@ static int snd_byt_wm5102_mc_probe(struct platform_device *pdev)
>>  	bool sof_parent;
>>  	int ret;
>>  
>> -	priv = devm_kzalloc(dev, sizeof(*priv), GFP_ATOMIC);
>> +	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
>>  	if (!priv)
>>  		return -ENOMEM;
>>  
>>
>