Hi Gary,
Some minor comments below.
On 16 December 2017 at 01:25, Gary R Hook <gary.hook@xxxxxxx> wrote:
>
> Commit 142a27f0a731 added support for a "best" RNG, and in doing so
> introduced a hang from rmmod/modprobe -r when the last RNG on the list
> was unloaded.
Nice catch. Thanks for fixing this.
> When the hwrng list is depleted, return the global variables to their
> original state and decrement all references to the object.
>
> Fixes: 142a27f0a731 ("hwrng: core - Reset user selected rng by writing "" to rng_current")
Please cc the commit author (in this case its me) so that this patch
gets noticed easily.
> Signed-off-by: Gary R Hook <gary.hook@xxxxxxx>
> ---
>
> Changes since v1: fix misspelled word in subject
>
> drivers/char/hw_random/core.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c
> index 657b8770b6b9..91bb98c42a1c 100644
> --- a/drivers/char/hw_random/core.c
> +++ b/drivers/char/hw_random/core.c
> @@ -306,6 +306,10 @@ static int enable_best_rng(void)
> ret = ((new_rng == current_rng) ? 0 : set_current_rng(new_rng));
> if (!ret)
> cur_rng_set_by_user = 0;
> + } else {
> + drop_current_rng();
When the hwrng list is empty just set current_rng = NULL instead of
calling drop_current_rng().
> + cur_rng_set_by_user = 0;
> + ret = 0;
> }
>
> return ret;
>
Regards,
PrasannaKumar
