On Fri, 25 Oct 2024, Mario Limonciello wrote:
> As multiple handlers may register for ACPI platform profile handler,
> only remove the sysfs group when the last one unregisters.
>
> Tested-by: Matthew Schwartz <matthew.schwartz@xxxxxxxxx>
> Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
> ---
> drivers/acpi/platform_profile.c | 13 ++++++++++++-
> 1 file changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
> index 81928adccfade..091ca6941a925 100644
> --- a/drivers/acpi/platform_profile.c
> +++ b/drivers/acpi/platform_profile.c
> @@ -23,6 +23,15 @@ static const char * const profile_names[] = {
> };
> static_assert(ARRAY_SIZE(profile_names) == PLATFORM_PROFILE_LAST);
>
> +static bool platform_profile_is_registered(void)
> +{
> + struct list_head *pos;
> + int count = 0;
> + list_for_each(pos, &platform_profile_handler_list)
> + count++;
> + return count > 0;
return !list_empty(&platform_profile_handler_list) ?
> +}
> +
> static ssize_t platform_profile_choices_show(struct device *dev,
> struct device_attribute *attr,
> char *buf)
> @@ -206,8 +215,10 @@ int platform_profile_remove(struct platform_profile_handler *pprof)
>
> list_del(&pprof->list);
>
> - sysfs_remove_group(acpi_kobj, &platform_profile_group);
> cur_profile = NULL;
> + if (!platform_profile_is_registered())
> + sysfs_remove_group(acpi_kobj, &platform_profile_group);
> +
> return 0;
> }
> EXPORT_SYMBOL_GPL(platform_profile_remove);
>
--
i.
