linux-kernel - Re: [PATCH v1 13/13] soc: mediatek: mtk-svs: keep svs alive even though debug cmd create fail

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Date:   Tue, 10 Jan 2023 05:35:16 +0000
From:   Roger Lu (陸瑞傑) <Roger.Lu@...iatek.com>
To:     "eballetbo@...il.com" <eballetbo@...il.com>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "khilman@...nel.org" <khilman@...nel.org>,
        "angelogioacchino.delregno@...labora.com" 
        <angelogioacchino.delregno@...labora.com>,
        "drinkcat@...gle.com" <drinkcat@...gle.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        Project_Global_Chrome_Upstream_Group 
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Jia-wei Chang (張佳偉) 
        <Jia-wei.Chang@...iatek.com>,
        Fan Chen (陳凡) <fan.chen@...iatek.com>
Subject: Re: [PATCH v1 13/13] soc: mediatek: mtk-svs: keep svs alive even
 though debug cmd create fail

Hi AngeloGioacchino,

Sorry for the late reply and thanks for the advices always.

On Tue, 2023-01-03 at 13:49 +0100, AngeloGioacchino Del Regno wrote:
> Il 26/12/22 10:42, Roger Lu ha scritto:
> > Some projects might not support DEBUG_FS but still needs svs to be
> > supported. Therefore, keep svs alive even though debug cmd create fail.
> > 
> > Signed-off-by: Roger Lu <roger.lu@...iatek.com>
> > ---
> >   drivers/soc/mediatek/mtk-svs.c | 4 +---
> >   1 file changed, 1 insertion(+), 3 deletions(-)
> > 
> > diff --git a/drivers/soc/mediatek/mtk-svs.c b/drivers/soc/mediatek/mtk-svs.c
> > index af3a12e29e78..c780a115543e 100644
> > --- a/drivers/soc/mediatek/mtk-svs.c
> > +++ b/drivers/soc/mediatek/mtk-svs.c
> > @@ -2390,10 +2390,8 @@ static int svs_probe(struct platform_device *pdev)
> >   	}
> >   
> 
> Instead of ignoring a planned failure, it's sensible to not fail at all:
> enclose this call and the svs_create_debug_cmds() function in an ifdef.
> 
> #ifdef CONFIG_DEBUG_FS
> 
> >   	ret = svs_create_debug_cmds(svsp);
> > -	if (ret) {
> > +	if (ret)
> >   		dev_err(svsp->dev, "svs create debug cmds fail: %d\n", ret);
> > -		goto svs_probe_iounmap;
> > -	}
> 
> #endif

Okay. I got it and will add ifdef CONFIG_DEBUG_FS in mtk-svs.c to make sure no
other side effects.

> 
> >   
> >   	return 0;
> >   
> > 
> 
> Regards,
> Angelo
> 
>