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Date:   Tue, 1 Aug 2023 12:32:01 +0200
From:   Herve Codina <herve.codina@bootlin.com>
To:     Andrew Lunn <andrew@lunn.ch>
Cc:     "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>, Lee Jones <lee@kernel.org>,
        Linus Walleij <linus.walleij@linaro.org>,
        Qiang Zhao <qiang.zhao@nxp.com>, Li Yang <leoyang.li@nxp.com>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@kernel.org>,
        Jaroslav Kysela <perex@perex.cz>,
        Takashi Iwai <tiwai@suse.com>,
        Shengjiu Wang <shengjiu.wang@gmail.com>,
        Xiubo Li <Xiubo.Lee@gmail.com>,
        Fabio Estevam <festevam@gmail.com>,
        Nicolin Chen <nicoleotsuka@gmail.com>,
        Christophe Leroy <christophe.leroy@csgroup.eu>,
        Randy Dunlap <rdunlap@infradead.org>, netdev@vger.kernel.org,
        linuxppc-dev@lists.ozlabs.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, alsa-devel@alsa-project.org,
        Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Subject: Re: [PATCH v2 20/28] net: wan: Add framer framework support
Message-ID: <20230801123201.25dee219@bootlin.com>
In-Reply-To: <84d6431f-bb55-4224-a4a5-45d7036f1e38@lunn.ch>
References: <20230726150225.483464-1-herve.codina@bootlin.com>
        <20230726150225.483464-21-herve.codina@bootlin.com>
        <84d6431f-bb55-4224-a4a5-45d7036f1e38@lunn.ch>
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On Tue, 1 Aug 2023 11:56:12 +0200
Andrew Lunn <andrew@lunn.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