netdev - Re: [PATCH v2 20/28] net: wan: Add framer framework support

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Message-ID: <20230801123201.25dee219@bootlin.com>
Date: Tue, 1 Aug 2023 12:32:01 +0200
From: Herve Codina <herve.codina@...tlin.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: "David S. Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
 <pabeni@...hat.com>, Rob Herring <robh+dt@...nel.org>, Krzysztof Kozlowski
 <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>,
 Lee Jones <lee@...nel.org>, Linus Walleij <linus.walleij@...aro.org>, Qiang
 Zhao <qiang.zhao@....com>, Li Yang <leoyang.li@....com>, Liam Girdwood
 <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, Jaroslav Kysela
 <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, Shengjiu Wang
 <shengjiu.wang@...il.com>, Xiubo Li <Xiubo.Lee@...il.com>, Fabio Estevam
 <festevam@...il.com>, Nicolin Chen <nicoleotsuka@...il.com>, Christophe
 Leroy <christophe.leroy@...roup.eu>, Randy Dunlap <rdunlap@...radead.org>,
 netdev@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 alsa-devel@...a-project.org, Thomas Petazzoni
 <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v2 20/28] net: wan: Add framer framework support

On Tue, 1 Aug 2023 11:56:12 +0200
Andrew Lunn <andrew@...n.ch> wrote:

> > +int framer_pm_runtime_get(struct framer *framer)
> > +{
> > +	int ret;
> > +
> > +	if (!framer)
> > +		return 0;  
> 
> Can framer be a NULL pointer? This sort of test often covers up
> bugs. So either let it dereference the NULL pointer and opps, or
> return -EINVAL.
> 

Well, in the current usage, it cannot be a NULL pointer.
I will simply remove the check (every where it is present) and
dereference the pointer instead of returning -EINVAL.

Regards,
Hervé

-- 
Hervé Codina, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com