On Thu, Oct 31, 2024, at 12:09 AM, Mario Limonciello wrote:
> If for any reason multiple profile handlers don't agree on the profile
> report the custom profile to userspace.
>
> Signed-off-by: Mario Limonciello <mario.limoncie...@amd.com>
> ---
> drivers/acpi/platform_profile.c | 39 +++++++++++++++++++++++++++------
> 1 file changed, 32 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
> index 3128bd16615b6..5baac1f9a9c0e 100644
> --- a/drivers/acpi/platform_profile.c
> +++ b/drivers/acpi/platform_profile.c
> @@ -51,6 +51,36 @@ static unsigned long platform_profile_get_choices(void)
> return aggregate;
> }
>
> +static int platform_profile_get_active(enum platform_profile_option *profile)
> +{
> + struct platform_profile_handler *handler;
> + enum platform_profile_option active = PLATFORM_PROFILE_LAST;
> + enum platform_profile_option val;
> + int err;
> +
> + lockdep_assert_held(&profile_lock);
> + list_for_each_entry(handler, &platform_profile_handler_list, list) {
> + err = handler->profile_get(handler, &val);
> + if (err) {
> + pr_err("Failed to get profile for handler %s\n",
> handler->name);
> + return err;
> + }
> +
> + if (WARN_ON(val >= PLATFORM_PROFILE_LAST))
> + return -EINVAL;
> +
> + if (active != val && active != PLATFORM_PROFILE_LAST) {
> + *profile = PLATFORM_PROFILE_CUSTOM;
> + return 0;
> + }
> + active = val;
> + }
> +
> + *profile = active;
> +
> + return 0;
> +}
> +
> static ssize_t platform_profile_choices_show(struct device *dev,
> struct device_attribute *attr,
> char *buf)
> @@ -81,18 +111,13 @@ static ssize_t platform_profile_show(struct device *dev,
> int err;
>
> scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) {
> - if (!cur_profile)
> + if (!platform_profile_is_registered())
> return -ENODEV;
> -
> - err = cur_profile->profile_get(cur_profile, &profile);
> + err = platform_profile_get_active(&profile);
> if (err)
> return err;
> }
>
> - /* Check that profile is valid index */
> - if (WARN_ON((profile < 0) || (profile >= ARRAY_SIZE(profile_names))))
> - return -EIO;
> -
> return sysfs_emit(buf, "%s\n", profile_names[profile]);
> }
>
> --
> 2.43.0
Looks good to me.
Reviewed-by: Mark Pearson <mpearson-len...@squebb.ca>
Mark
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