linux-kernel - Re: [PATCH 1/2] hwrng: stm32 - fix number of returned bytes on read

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Date:   Fri, 21 Oct 2022 18:41:07 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Tomas Marek <tomas.marek@...est.cz>
Cc:     mpm@...enic.com, herbert@...dor.apana.org.au,
        mcoquelin.stm32@...il.com, linux-arm-kernel@...ts.infradead.org,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        alexandre.torgue@...s.st.com, oleg.karfich@...o.com
Subject: Re: [PATCH 1/2] hwrng: stm32 - fix number of returned bytes on read

On Wed, Oct 12, 2022 at 06:09:23PM +0200, Tomas Marek wrote:
>
> diff --git a/drivers/char/hw_random/stm32-rng.c b/drivers/char/hw_random/stm32-rng.c
> index bc22178f83e8..8eaacefd498b 100644
> --- a/drivers/char/hw_random/stm32-rng.c
> +++ b/drivers/char/hw_random/stm32-rng.c
> @@ -49,11 +49,13 @@ static int stm32_rng_read(struct hwrng *rng, void *data, size_t max, bool wait)
>  		/* Manage timeout which is based on timer and take */
>  		/* care of initial delay time when enabling rng	*/
>  		if (!sr && wait) {
> -			retval = readl_relaxed_poll_timeout_atomic(priv->base
> +			int ret;
> +
> +			ret = readl_relaxed_poll_timeout_atomic(priv->base

This would make a lot more sense if you called it err instead of ret.

But as you're fixing a real bug I'm going to apply your patch as is
and you can post an incremental patch to improve it.

Thanks,
-- 
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