On 15/09/16 11:39, Tomeu Vizoso wrote:
> In platforms such as Rockchip's, the array of domains isn't always
> filled without holes, as which domains are present depend on the
> particular SoC revision.
>
> By allowing holes to be in the array, such SoCs can still use a single
> set of constants to index the array of power domains.
>
> Fixes: 0159ec670763 ("PM / Domains: Verify the PM domain is present when
> adding a provider")
> Signed-off-by: Tomeu Vizoso <tomeu.viz...@collabora.com>
> Cc: Jon Hunter <jonath...@nvidia.com>
> Cc: Heiko Stuebner <he...@sntech.de>
> ---
> drivers/base/power/domain.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
> index b0cf46dcae73..ce3f483ec67b 100644
> --- a/drivers/base/power/domain.c
> +++ b/drivers/base/power/domain.c
> @@ -1581,6 +1581,8 @@ int of_genpd_add_provider_onecell(struct device_node
> *np,
> mutex_lock(&gpd_list_lock);
>
> for (i = 0; i < data->num_domains; i++) {
> + if (!data->domains[i])
> + continue;
> if (!pm_genpd_present(data->domains[i]))
> goto error;
>
Sounds reasonable and sorry I had not thought of this. Can you also make
sure we check that !data->domains[i] in the error path as well or
potentially we could have a NULL pointer dereference in the case of an
actual error.
Cheers
Jon
--
nvpublic
