Re: [PATCH] hwrng: exynos - Signedness bug in exynos_trng_do_read()

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On Wed, Jan 10, 2018 at 10:36 AM, Dan Carpenter
<dan.carpenter@xxxxxxxxxx> wrote:
> "val" needs to be signed for the error handling to work.
>
> Fixes: 6cd225cc5d8a ("hwrng: exynos - add Samsung Exynos True RNG driver")
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
>
> diff --git a/drivers/char/hw_random/exynos-trng.c b/drivers/char/hw_random/exynos-trng.c
> index 34d6f51ecbee..f4643e3ec346 100644
> --- a/drivers/char/hw_random/exynos-trng.c
> +++ b/drivers/char/hw_random/exynos-trng.c
> @@ -55,7 +55,7 @@ static int exynos_trng_do_read(struct hwrng *rng, void *data, size_t max,
>                                bool wait)
>  {
>         struct exynos_trng_dev *trng;
> -       u32 val;
> +       int val;

It seems that one forgot to run Smatch on the driver :).

Reviewed-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>

Best regards,
Krzysztof
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