linux-kernel - Re: [PATCH v3 3/6] crypto: Add Qcom prng driver

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Message-ID: <2990655.vKmMgW600W@tauon.chronox.de>
Date:   Tue, 03 Jul 2018 15:28:04 +0200
From:   Stephan Mueller <smueller@...onox.de>
To:     Vinod Koul <vkoul@...nel.org>
Cc:     linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Matt Mackall <mpm@...enic.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-arm-msm@...r.kernel.org, Stephen Boyd <swboyd@...omium.org>,
        Timur Tabi <timur@...eaurora.org>
Subject: Re: [PATCH v3 3/6] crypto: Add Qcom prng driver

Am Dienstag, 3. Juli 2018, 08:04:31 CEST schrieb Vinod Koul:

Hi Vinod,

> +static int qcom_rng_read(struct qcom_rng *rng, void *data, size_t max)
> +{
> +	size_t currsize = 0;
> +	u32 *retdata = data;

How can you be sure that this cast is appropriate? I.e. how is it guaranteed 
that data is 4-byte aligned?

Also, the data variable in qcom_rng_generate is a u8 -- shouldn't this type be 
used instead of a void?


Ciao
Stephan