[PATCH 2/3] driver: rng: Fix SMCCC TRNG crash

[Heinrich Schuchardt]

On 25.01.24 15:05, Weizhao Ouyang wrote:
> Fix a SMCCC TRNG null pointer crash due to a failed smccc feature
> binding.
>
> Signed-off-by: Weizhao Ouyang <o451686892 at gmail.com>

Reviewed-by: Heinrich Schuchardt <xypron.glpk at gmx.de>

> ---
>   drivers/rng/smccc_trng.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/rng/smccc_trng.c b/drivers/rng/smccc_trng.c
> index 3a4bb33941..3087cb991a 100644
> --- a/drivers/rng/smccc_trng.c
> +++ b/drivers/rng/smccc_trng.c
> @@ -166,7 +166,7 @@ static int smccc_trng_probe(struct udevice *dev)
>   	struct smccc_trng_priv *priv = dev_get_priv(dev);
>   	struct arm_smccc_res res;
>
> -	if (!(smccc_trng_is_supported(smccc->invoke_fn)))
> +	if (!smccc || !(smccc_trng_is_supported(smccc->invoke_fn)))
>   		return -ENODEV;
>
>   	/* At least one of 64bit and 32bit interfaces is available */