linux-kernel - Re: [PATCH 2/3] hwrng: exynos - add Samsung Exynos True RNG driver

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Date:   Mon, 27 Nov 2017 08:23:50 +0100
From:   Łukasz Stelmach <l.stelmach@...sung.com>
To:     PrasannaKumar Muralidharan <prasannatsmkumar@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>, Matt Mackall <mpm@...enic.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        devicetree@...r.kernel.org, linux-crypto@...r.kernel.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: Re: [PATCH 2/3] hwrng: exynos - add Samsung Exynos True RNG driver

It was <2017-11-24 pią 16:25>, when PrasannaKumar Muralidharan wrote:
>> +}
>> +
>> +static int exynos_trng_do_read(struct hwrng *rng, void *data, size_t max,
>> +                              bool wait)
>> +{
>> +       struct exynos_trng_dev *trng;
>> +       u32 val;
>> +
>> +       max = max > (EXYNOS_TRNG_FIFO_LEN * 4) ?
>> +               (EXYNOS_TRNG_FIFO_LEN * 4) : max;
>
> max is always > 32. This condition is not required.

No, it is not. http://elixir.free-electrons.com/linux/latest/source/drivers/char/hw_random/core.c#L67
-- 
Łukasz Stelmach
Samsung R&D Institute Poland
Samsung Electronics

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