linux-kernel - Re: [PATCH 05/10] hwrng: stm32 - rework error handling in stm32_rng

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Message-ID: <ZP/iw6jvHrlBavdK@gondor.apana.org.au>
Date:   Tue, 12 Sep 2023 12:02:11 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Gatien Chevallier <gatien.chevallier@...s.st.com>
Cc:     Olivia Mackall <olivia@...enic.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Lionel Debieve <lionel.debieve@...s.st.com>,
        linux-crypto@...r.kernel.org, devicetree@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 05/10] hwrng: stm32 - rework error handling in
 stm32_rng_read()

On Fri, Sep 08, 2023 at 06:51:15PM +0200, Gatien Chevallier wrote:
>
> +			if (WARN_ON(sr & RNG_SR_CEIS), "RNG clock too slow - %x\n", sr)

Introducing an unconditional WARN_ON is not acceptable.  If you
really need it, make it WARN_ON_ONCE.  But why does this need
to be a WARN instead of dev_err?

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt