On Thu, Oct 31, 2024, at 12:09 AM, Mario Limonciello wrote:
> As multiple platform profile handlers might not all support the same
> profile, cycling to the next profile could have a different result
> depending on what handler are registered.
>
> Check what is active and supported by all handlers to decide what
> to do.
>
> Signed-off-by: Mario Limonciello <mario.limoncie...@amd.com>
> ---
> drivers/acpi/platform_profile.c | 35 ++++++++++++++++++++++-----------
> 1 file changed, 23 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
> index 5baac1f9a9c0e..9b681884ae324 100644
> --- a/drivers/acpi/platform_profile.c
> +++ b/drivers/acpi/platform_profile.c
> @@ -187,30 +187,41 @@ EXPORT_SYMBOL_GPL(platform_profile_notify);
>
> int platform_profile_cycle(void)
> {
> + enum platform_profile_option next = PLATFORM_PROFILE_LAST;
> + struct platform_profile_handler *handler;
> enum platform_profile_option profile;
> - enum platform_profile_option next;
> + unsigned long choices;
> int err;
>
> scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) {
> - if (!cur_profile)
> - return -ENODEV;
> -
> - err = cur_profile->profile_get(cur_profile, &profile);
> + err = platform_profile_get_active(&profile);
> if (err)
> return err;
>
> - next = find_next_bit_wrap(cur_profile->choices,
> PLATFORM_PROFILE_LAST,
> - profile + 1);
> + choices = platform_profile_get_choices();
>
> - if (WARN_ON(next == PLATFORM_PROFILE_LAST))
> - return -EINVAL;
> + next = find_next_bit_wrap(&choices,
> + PLATFORM_PROFILE_LAST,
> + profile + 1);
>
> - err = cur_profile->profile_set(cur_profile, next);
> - if (err)
> - return err;
> + list_for_each_entry(handler, &platform_profile_handler_list,
> list) {
> + err = handler->profile_set(handler, next);
> + if (err) {
> + pr_err("Failed to set profile for handler
> %s\n", handler->name);
Suggest highlighting which profile failed (profile_names[next]).
> + break;
> + }
> + }
> + if (err) {
> + list_for_each_entry_continue_reverse(handler,
> &platform_profile_handler_list, list) {
> + err = handler->profile_set(handler,
> PLATFORM_PROFILE_BALANCED);
> + if (err)
> + pr_err("Failed to revert profile for
> handler %s\n",
> handler->name);
Suggest 'Failed to revert to balanced profiile for ...'
> + }
> + }
> }
>
> sysfs_notify(acpi_kobj, NULL, "platform_profile");
> +
> return 0;
> }
> EXPORT_SYMBOL_GPL(platform_profile_cycle);
> --
> 2.43.0
My note from patch 15 applies here with having choices determined during
registration/unregistration.
Mark
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