linux-kernel - Re: [PATCH v6 5/7] ASoC: fsl_asrc: Move common definition to fsl_asrc

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Message-ID: <CAA+D8AM69bhorQKikQGwwFRqgBYN8V2pXBW5JLZyFCVHWKkNGg@mail.gmail.com>
Date:   Sat, 11 Apr 2020 13:49:43 +0800
From:   Shengjiu Wang <shengjiu.wang@...il.com>
To:     Nicolin Chen <nicoleotsuka@...il.com>
Cc:     Shengjiu Wang <shengjiu.wang@....com>,
        Mark Rutland <mark.rutland@....com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux-ALSA <alsa-devel@...a-project.org>,
        Timur Tabi <timur@...nel.org>, Xiubo Li <Xiubo.Lee@...il.com>,
        linuxppc-dev@...ts.ozlabs.org, Takashi Iwai <tiwai@...e.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Brown <broonie@...nel.org>,
        Fabio Estevam <festevam@...il.com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 5/7] ASoC: fsl_asrc: Move common definition to fsl_asrc_common

Hi

On Tue, Apr 7, 2020 at 7:50 AM Nicolin Chen <nicoleotsuka@...il.com> wrote:
>
> On Wed, Apr 01, 2020 at 04:45:38PM +0800, Shengjiu Wang wrote:
>
> >  static int fsl_asrc_probe(struct platform_device *pdev)
> >  {
> >       struct device_node *np = pdev->dev.of_node;
> >       struct fsl_asrc *asrc;
> > +     struct fsl_asrc_priv *asrc_priv;
>
> Could we move it before "struct fsl_asrc *asrc;"?
>
> > diff --git a/sound/soc/fsl/fsl_asrc_common.h b/sound/soc/fsl/fsl_asrc_common.h
> > new file mode 100644
> > index 000000000000..5c93ccdfc30a
> > --- /dev/null
> > +++ b/sound/soc/fsl/fsl_asrc_common.h
>
> > +#define PAIR_CTX_NUM  0x4
> > +#define PAIR_PRIVAT_SIZE 0x400
>
> "PRIVAT_" => "PRIVATE_"
>
> > +/**
> > + * fsl_asrc_pair: ASRC common data
>
> "fsl_asrc_pair" => "fsl_asrc"
>
> > + */
> > +struct fsl_asrc {
>
> > diff --git a/sound/soc/fsl/fsl_asrc_dma.c b/sound/soc/fsl/fsl_asrc_dma.c
> > index b15946e03380..5cf0468ce6e3 100644
> > --- a/sound/soc/fsl/fsl_asrc_dma.c
> > +++ b/sound/soc/fsl/fsl_asrc_dma.c
>
> > @@ -311,11 +311,12 @@ static int fsl_asrc_dma_startup(struct snd_soc_component *component,
> >               return ret;
> >       }
> >
> > -     pair = kzalloc(sizeof(struct fsl_asrc_pair), GFP_KERNEL);
> > +     pair = kzalloc(sizeof(struct fsl_asrc_pair) + PAIR_PRIVAT_SIZE, GFP_KERNEL);
>
> If we only use the PAIR_PRIVATE_SIZE here, maybe we can put the
> define in this file too, rather than in the header file.
>
> And could fit 80 characters:
>
> +       pair = kzalloc(sizeof(*pair) + PAIR_PRIVAT_SIZE, GFP_KERNEL);

I will use a function pointer
    int (*get_pair_priv_size)(void)
to avoid definition of  PAIR_PRIVATE_SIZE. which is not safe.

best regards
wang shengjiu