On Wed, Jan 31, 2024 at 02:14:25PM +0000, Weizhao Ouyang wrote:
> Fix a SMCCC TRNG null pointer crash due to a failed smccc feature
> binding.
>
> Fixes: 53355bb86c25 ("drivers: rng: add smccc trng driver")
> Reviewed-by: Heinrich Schuchardt <xypron.g...@gmx.de>
> Signed-off-by: Weizhao Ouyang <o451686...@gmail.com>
Reviewed-by: Matthias Brugger <mbrug...@suse.com>
> ---
> v3: add Fixes tag
> ---
> 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 */
> --
> 2.39.2
