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Message-ID: <8263323b-2eae-4158-acbf-5ca830d9aa79@amd.com>
Date: Thu, 9 Jan 2025 10:45:38 -0600
From: Mario Limonciello <mario.limonciello@....com>
To: Kurt Borja <kuurtb@...il.com>, platform-driver-x86@...r.kernel.org
Cc: "Rafael J. Wysocki" <rafael@...nel.org>, Len Brown <lenb@...nel.org>,
linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
Armin Wolf <W_Armin@....de>, Joshua Grisham <josh@...huagrisham.com>,
"Derek J . Clark" <derekjohn.clark@...il.com>,
Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
Hans de Goede <hdegoede@...hat.com>, Maximilian Luz
<luzmaximilian@...il.com>, "Lee, Chun-Yi" <jlee@...e.com>,
Shyam Sundar S K <Shyam-sundar.S-k@....com>,
Corentin Chary <corentin.chary@...il.com>, "Luke D. Jones"
<luke@...nes.dev>, Lyndon Sanche <lsanche@...deno.ca>,
Ike Panhc <ike.pan@...onical.com>,
Henrique de Moraes Holschuh <hmh@....eng.br>,
Mark Pearson <mpearson-lenovo@...ebb.ca>,
Colin Ian King <colin.i.king@...il.com>,
Alexis Belmonte <alexbelm48@...il.com>, Ai Chao <aichao@...inos.cn>,
Uwe Kleine-König <u.kleine-koenig@...libre.com>,
Gergo Koteles <soyer@....hu>, Dell.Client.Kernel@...l.com,
ibm-acpi-devel@...ts.sourceforge.net
Subject: Re: [PATCH 14/18] ACPI: platform_profile: Remove
platform_profile_handler from exported symbols
On 1/9/2025 09:06, Kurt Borja wrote:
> In order to protect the platform_profile_handler from API consumers,
> allocate it in platform_profile_register() and modify it's signature
> accordingly.
>
> Remove the platform_profile_handler from all consumer drivers and
> replace them with a pointer to the class device, which is
> now returned from platform_profile_register().
>
> Replace *pprof with a pointer to the class device in the rest of
> exported symbols.
>
> Signed-off-by: Kurt Borja <kuurtb@...il.com>
> ---
> drivers/acpi/platform_profile.c | 93 ++++++++++++-------
> .../surface/surface_platform_profile.c | 11 +--
> drivers/platform/x86/acer-wmi.c | 18 ++--
> drivers/platform/x86/amd/pmf/pmf.h | 2 +-
> drivers/platform/x86/amd/pmf/sps.c | 15 +--
> drivers/platform/x86/asus-wmi.c | 17 ++--
> drivers/platform/x86/dell/alienware-wmi.c | 10 +-
> drivers/platform/x86/dell/dell-pc.c | 22 ++---
> drivers/platform/x86/hp/hp-wmi.c | 19 ++--
> drivers/platform/x86/ideapad-laptop.c | 14 +--
> .../platform/x86/inspur_platform_profile.c | 9 +-
> drivers/platform/x86/thinkpad_acpi.c | 14 +--
> include/linux/platform_profile.h | 12 ++-
> 13 files changed, 131 insertions(+), 125 deletions(-)
>
> diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
> index 5a867b912964..fdf79b81b62e 100644
> --- a/drivers/acpi/platform_profile.c
> +++ b/drivers/acpi/platform_profile.c
> @@ -3,6 +3,7 @@
> /* Platform profile sysfs interface */
>
> #include <linux/acpi.h>
> +#include <linux/cleanup.h>
> #include <linux/bits.h>
> #include <linux/init.h>
> #include <linux/kdev_t.h>
> @@ -213,9 +214,17 @@ static struct attribute *profile_attrs[] = {
> };
> ATTRIBUTE_GROUPS(profile);
>
> +static void pprof_device_release(struct device *dev)
> +{
> + struct platform_profile_handler *pprof = to_pprof_handler(dev);
> +
> + kfree(pprof);
> +}
> +
> static const struct class platform_profile_class = {
> .name = "platform-profile",
> .dev_groups = profile_groups,
> + .dev_release = pprof_device_release,
> };
>
> /**
> @@ -409,10 +418,10 @@ static const struct attribute_group platform_profile_group = {
> .is_visible = profile_class_is_visible,
> };
>
> -void platform_profile_notify(struct platform_profile_handler *pprof)
> +void platform_profile_notify(struct device *dev)
> {
> scoped_cond_guard(mutex_intr, return, &profile_lock) {
> - _notify_class_profile(&pprof->class_dev, NULL);
> + _notify_class_profile(dev, NULL);
> }
> sysfs_notify(acpi_kobj, NULL, "platform_profile");
> }
> @@ -461,40 +470,57 @@ int platform_profile_cycle(void)
> }
> EXPORT_SYMBOL_GPL(platform_profile_cycle);
>
> -int platform_profile_register(struct platform_profile_handler *pprof, void *drvdata)
> +struct device *platform_profile_register(struct device *dev, const char *name,
> + void *drvdata,
> + const struct platform_profile_ops *ops)
> {
> + struct device *ppdev;
> + int minor;
> int err;
>
> - /* Sanity check the profile handler */
> - if (!pprof || !pprof->ops->profile_set || !pprof->ops->profile_get ||
> - !pprof->ops->choices) {
> + /* Sanity check */
> + if (!dev || !name || !ops || !ops->profile_get ||
> + !ops->profile_set || !ops->choices) {
> pr_err("platform_profile: handler is invalid\n");
> - return -EINVAL;
> + return ERR_PTR(-EINVAL);
> }
>
> - err = pprof->ops->choices(pprof);
> + struct platform_profile_handler *pprof __free(kfree) = kzalloc(
> + sizeof(*pprof), GFP_KERNEL);
> + if (!pprof)
> + return ERR_PTR(-ENOMEM);
> +
> + err = ops->choices(pprof);
> if (err < 0)
> - return err;
> + return ERR_PTR(err);
>
> if (bitmap_empty(pprof->choices, PLATFORM_PROFILE_LAST)) {
> pr_err("platform_profile: no available profiles\n");
> - return -EINVAL;
> + return ERR_PTR(-EINVAL);
> }
>
> guard(mutex)(&profile_lock);
>
> /* create class interface for individual handler */
> - pprof->minor = ida_alloc(&platform_profile_ida, GFP_KERNEL);
> - if (pprof->minor < 0)
> - return pprof->minor;
> + minor = ida_alloc(&platform_profile_ida, GFP_KERNEL);
> + if (minor < 0)
> + return ERR_PTR(minor);
>
> + pprof->name = name;
> + pprof->ops = ops;
> + pprof->minor = minor;
> pprof->class_dev.class = &platform_profile_class;
> - pprof->class_dev.parent = pprof->dev;
> + pprof->class_dev.parent = dev;
> dev_set_drvdata(&pprof->class_dev, drvdata);
> dev_set_name(&pprof->class_dev, "platform-profile-%d", pprof->minor);
> err = device_register(&pprof->class_dev);
> - if (err)
> + if (err) {
> + put_device(&no_free_ptr(pprof)->class_dev);
> goto cleanup_ida;
> + }
> +
> + /* After this point, device_unregister will free pprof on error */
> + ppdev = &no_free_ptr(pprof)->class_dev;
>
> sysfs_notify(acpi_kobj, NULL, "platform_profile");
>
> @@ -502,20 +528,21 @@ int platform_profile_register(struct platform_profile_handler *pprof, void *drvd
> if (err)
> goto cleanup_cur;
>
> - return 0;
> + return ppdev;
>
> cleanup_cur:
> - device_unregister(&pprof->class_dev);
> + device_unregister(ppdev);
>
> cleanup_ida:
> - ida_free(&platform_profile_ida, pprof->minor);
> + ida_free(&platform_profile_ida, minor);
>
> - return err;
> + return ERR_PTR(err);
> }
> EXPORT_SYMBOL_GPL(platform_profile_register);
>
> -int platform_profile_remove(struct platform_profile_handler *pprof)
> +int platform_profile_remove(struct device *dev)
> {
> + struct platform_profile_handler *pprof = to_pprof_handler(dev);
> int id;
> guard(mutex)(&profile_lock);
>
> @@ -533,30 +560,32 @@ EXPORT_SYMBOL_GPL(platform_profile_remove);
>
> static void devm_platform_profile_release(struct device *dev, void *res)
> {
> - struct platform_profile_handler **pprof = res;
> + struct device **ppdev = res;
>
> - platform_profile_remove(*pprof);
> + platform_profile_remove(*ppdev);
> }
>
> -int devm_platform_profile_register(struct platform_profile_handler *pprof, void *drvdata)
> +struct device *devm_platform_profile_register(struct device *dev, const char *name,
> + void *drvdata,
> + const struct platform_profile_ops *ops)
> {
> - struct platform_profile_handler **dr;
> - int ret;
> + struct device *ppdev;
> + struct device **dr;
>
> dr = devres_alloc(devm_platform_profile_release, sizeof(*dr), GFP_KERNEL);
> if (!dr)
> - return -ENOMEM;
> + return ERR_PTR(-ENOMEM);
>
> - ret = platform_profile_register(pprof, drvdata);
> - if (ret) {
> + ppdev = platform_profile_register(dev, name, drvdata, ops);
> + if (IS_ERR(dev)) {
> devres_free(dr);
> - return ret;
> + return ppdev;
> }
>
> - *dr = pprof;
> - devres_add(pprof->dev, dr);
> + *dr = ppdev;
> + devres_add(dev, dr);
>
> - return 0;
> + return ppdev;
> }
> EXPORT_SYMBOL_GPL(devm_platform_profile_register);
>
> diff --git a/drivers/platform/surface/surface_platform_profile.c b/drivers/platform/surface/surface_platform_profile.c
> index efb6653ed1d5..965940223892 100644
> --- a/drivers/platform/surface/surface_platform_profile.c
> +++ b/drivers/platform/surface/surface_platform_profile.c
> @@ -40,7 +40,7 @@ struct ssam_tmp_profile_info {
>
> struct ssam_platform_profile_device {
> struct ssam_device *sdev;
> - struct platform_profile_handler handler;
> + struct device *ppdev;
> bool has_fan;
> };
>
> @@ -228,13 +228,12 @@ static int surface_platform_profile_probe(struct ssam_device *sdev)
> tpd->sdev = sdev;
> ssam_device_set_drvdata(sdev, tpd);
>
> - tpd->handler.name = "Surface Platform Profile";
> - tpd->handler.dev = &sdev->dev;
> - tpd->handler.ops = &ssam_platform_profile_ops;
> -
> tpd->has_fan = device_property_read_bool(&sdev->dev, "has_fan");
>
> - return devm_platform_profile_register(&tpd->handler, tpd);
> + tpd->ppdev = devm_platform_profile_register(
> + &sdev->dev, "Surface Platform Profile", tpd, &ssam_platform_profile_ops);
> +
> + return PTR_ERR_OR_ZERO(tpd->ppdev);
> }
>
> static const struct ssam_device_id ssam_platform_profile_match[] = {
> diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
> index 70ec667e0cbf..2059b29dd36b 100644
> --- a/drivers/platform/x86/acer-wmi.c
> +++ b/drivers/platform/x86/acer-wmi.c
> @@ -742,7 +742,7 @@ static const struct dmi_system_id non_acer_quirks[] __initconst = {
> {}
> };
>
> -static struct platform_profile_handler platform_profile_handler;
> +static struct device *platform_profile_device;
> static bool platform_profile_support;
>
> /*
> @@ -1921,16 +1921,10 @@ static const struct platform_profile_ops acer_predator_v4_platform_profile_ops =
> static int acer_platform_profile_setup(struct platform_device *device)
> {
> if (quirks->predator_v4) {
> - int err;
> -
> - platform_profile_handler.name = "acer-wmi";
> - platform_profile_handler.dev = &device->dev;
> - platform_profile_handler.ops =
> - &acer_predator_v4_platform_profile_ops;
> -
> - err = devm_platform_profile_register(&platform_profile_handler, NULL);
> - if (err)
> - return err;
> + platform_profile_device = devm_platform_profile_register(
> + &device->dev, "acer-wmi", NULL, &acer_predator_v4_platform_profile_ops);
> + if (IS_ERR(platform_profile_device))
> + return PTR_ERR(platform_profile_device);
>
> platform_profile_support = true;
>
> @@ -2017,7 +2011,7 @@ static int acer_thermal_profile_change(void)
> if (tp != ACER_PREDATOR_V4_THERMAL_PROFILE_TURBO_WMI)
> last_non_turbo_profile = tp;
>
> - platform_profile_notify(&platform_profile_handler);
> + platform_profile_notify(platform_profile_device);
> }
>
> return 0;
> diff --git a/drivers/platform/x86/amd/pmf/pmf.h b/drivers/platform/x86/amd/pmf/pmf.h
> index 198bfe3306be..3806f9efaff8 100644
> --- a/drivers/platform/x86/amd/pmf/pmf.h
> +++ b/drivers/platform/x86/amd/pmf/pmf.h
> @@ -338,7 +338,7 @@ struct amd_pmf_dev {
> struct mutex lock; /* protects the PMF interface */
> u32 supported_func;
> enum platform_profile_option current_profile;
> - struct platform_profile_handler pprof;
> + struct device *ppdev; /* platform profile class device */
> struct dentry *dbgfs_dir;
> int hb_interval; /* SBIOS heartbeat interval */
> struct delayed_work heart_beat;
> diff --git a/drivers/platform/x86/amd/pmf/sps.c b/drivers/platform/x86/amd/pmf/sps.c
> index 4f80a73eff9f..e8d2de9bb646 100644
> --- a/drivers/platform/x86/amd/pmf/sps.c
> +++ b/drivers/platform/x86/amd/pmf/sps.c
> @@ -420,15 +420,16 @@ int amd_pmf_init_sps(struct amd_pmf_dev *dev)
> amd_pmf_set_sps_power_limits(dev);
> }
>
> - dev->pprof.name = "amd-pmf";
> - dev->pprof.dev = dev->dev;
> - dev->pprof.ops = &amd_pmf_profile_ops;
> -
> /* Create platform_profile structure and register */
> - err = devm_platform_profile_register(&dev->pprof, dev);
> - if (err)
> + dev->ppdev = devm_platform_profile_register(
> + dev->dev, "amd-pmf", dev, &amd_pmf_profile_ops);
> + if (IS_ERR(dev->ppdev)) {
> + err = PTR_ERR(dev->ppdev);
> dev_err(dev->dev, "Failed to register SPS support, this is most likely an SBIOS bug: %d\n",
> err);
>
> - return err;
> + return err;
> + }
> +
> + return 0;
Maybe instead of:
if (IS_ERR()) {
err = PTR_ERR();
dev_err();
return err;
}
return 0;
You do this:
if (IS_ERR()) {
err = PTR_ERR();
dev_err();
}
return err;
> }
> diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
> index 5c7099dc6109..809ab0353b68 100644
> --- a/drivers/platform/x86/asus-wmi.c
> +++ b/drivers/platform/x86/asus-wmi.c
> @@ -313,7 +313,7 @@ struct asus_wmi {
> bool mid_fan_curve_available;
> struct fan_curve_data custom_fan_curves[3];
>
> - struct platform_profile_handler platform_profile_handler;
> + struct device *platform_profile_device;
> bool platform_profile_support;
>
> // The RSOC controls the maximum charging percentage.
> @@ -3789,7 +3789,7 @@ static ssize_t throttle_thermal_policy_store(struct device *dev,
> * Ensure that platform_profile updates userspace with the change to ensure
> * that platform_profile and throttle_thermal_policy_mode are in sync.
> */
> - platform_profile_notify(&asus->platform_profile_handler);
> + platform_profile_notify(asus->platform_profile_device);
>
> return count;
> }
> @@ -3891,15 +3891,10 @@ static int platform_profile_setup(struct asus_wmi *asus)
>
> dev_info(dev, "Using throttle_thermal_policy for platform_profile support\n");
>
> - asus->platform_profile_handler.name = "asus-wmi";
> - asus->platform_profile_handler.dev = dev;
> - asus->platform_profile_handler.ops = &asus_wmi_platform_profile_ops;
> -
> - err = devm_platform_profile_register(&asus->platform_profile_handler, asus);
> - if (err == -EEXIST) {
> - pr_warn("%s, a platform_profile handler is already registered\n", __func__);
> - return 0;
> - } else if (err) {
> + asus->platform_profile_device = devm_platform_profile_register(
> + dev, "asus-wmi", asus, &asus_wmi_platform_profile_ops);
> + if (IS_ERR(asus->platform_profile_device)) {
> + err = PTR_ERR(asus->platform_profile_device);
> pr_err("%s, failed at devm_platform_profile_register: %d\n", __func__, err);
> return err;
> }
> diff --git a/drivers/platform/x86/dell/alienware-wmi.c b/drivers/platform/x86/dell/alienware-wmi.c
> index a8961de004ab..1eaa746eb4f1 100644
> --- a/drivers/platform/x86/dell/alienware-wmi.c
> +++ b/drivers/platform/x86/dell/alienware-wmi.c
> @@ -414,7 +414,6 @@ static struct platform_device *platform_device;
> static struct device_attribute *zone_dev_attrs;
> static struct attribute **zone_attrs;
> static struct platform_zone *zone_data;
> -static struct platform_profile_handler pp_handler;
> static enum wmax_thermal_mode supported_thermal_profiles[PLATFORM_PROFILE_LAST];
>
> static struct platform_driver platform_driver = {
> @@ -1165,11 +1164,12 @@ static const struct platform_profile_ops awcc_platform_profile_ops = {
>
> static int create_thermal_profile(struct platform_device *platform_device)
> {
> - pp_handler.name = "alienware-wmi";
> - pp_handler.dev = &platform_device->dev;
> - pp_handler.ops = &awcc_platform_profile_ops;
> + struct device *ppdev;
>
> - return devm_platform_profile_register(&pp_handler, NULL);
> + ppdev = devm_platform_profile_register(
> + &platform_device->dev, "alienware-wmi", NULL, &awcc_platform_profile_ops);
> +
> + return PTR_ERR_OR_ZERO(ppdev);
> }
>
> static int __init alienware_wmi_init(void)
> diff --git a/drivers/platform/x86/dell/dell-pc.c b/drivers/platform/x86/dell/dell-pc.c
> index dda6f13295e8..4ff80ed4f157 100644
> --- a/drivers/platform/x86/dell/dell-pc.c
> +++ b/drivers/platform/x86/dell/dell-pc.c
> @@ -109,8 +109,6 @@ MODULE_DEVICE_TABLE(dmi, dell_device_table);
> #define DELL_ACC_SET_FIELD GENMASK(11, 8)
> #define DELL_THERMAL_SUPPORTED GENMASK(3, 0)
>
> -static struct platform_profile_handler *thermal_handler;
> -
> enum thermal_mode_bits {
> DELL_BALANCED = BIT(0),
> DELL_COOL_BOTTOM = BIT(1),
> @@ -254,6 +252,7 @@ static const struct platform_profile_ops dell_pc_platform_profile_ops = {
>
> static int thermal_init(void)
> {
> + struct device *ppdev;
> int ret;
>
> /* If thermal commands are not supported, exit without error */
> @@ -271,26 +270,17 @@ static int thermal_init(void)
> if (IS_ERR(platform_device))
> return PTR_ERR(platform_device);
>
> - thermal_handler = devm_kzalloc(&platform_device->dev, sizeof(*thermal_handler), GFP_KERNEL);
> - if (!thermal_handler) {
> - ret = -ENOMEM;
> - goto cleanup_platform_device;
> - }
> - thermal_handler->name = "dell-pc";
> - thermal_handler->dev = &platform_device->dev;
> - thermal_handler->ops = &dell_pc_platform_profile_ops;
> -
> /* Clean up if failed */
> - ret = devm_platform_profile_register(thermal_handler, NULL);
> - if (ret)
> + ppdev = devm_platform_profile_register(
> + &platform_device->dev, "dell-pc", NULL, &dell_pc_platform_profile_ops);
> + if (IS_ERR(ppdev)) {
> + ret = PTR_ERR(ppdev);
> goto cleanup_thermal_handler;
> + }
>
> return 0;
>
> cleanup_thermal_handler:
> - thermal_handler = NULL;
> -
> -cleanup_platform_device:
> platform_device_unregister(platform_device);
>
> return ret;
> diff --git a/drivers/platform/x86/hp/hp-wmi.c b/drivers/platform/x86/hp/hp-wmi.c
> index 8a620d36f926..1b9e176f8d6f 100644
> --- a/drivers/platform/x86/hp/hp-wmi.c
> +++ b/drivers/platform/x86/hp/hp-wmi.c
> @@ -273,7 +273,7 @@ static DEFINE_MUTEX(active_platform_profile_lock);
> static struct input_dev *hp_wmi_input_dev;
> static struct input_dev *camera_shutter_input_dev;
> static struct platform_device *hp_wmi_platform_dev;
> -static struct platform_profile_handler platform_profile_handler;
> +static struct device *platform_profile_device;
> static struct notifier_block platform_power_source_nb;
> static enum platform_profile_option active_platform_profile;
> static bool platform_profile_support;
> @@ -1602,6 +1602,7 @@ static const struct platform_profile_ops hp_wmi_platform_profile_ops = {
>
> static int thermal_profile_setup(struct platform_device *device)
> {
> + const struct platform_profile_ops *ops;
> int err, tp;
>
> if (is_omen_thermal_profile()) {
> @@ -1617,7 +1618,7 @@ static int thermal_profile_setup(struct platform_device *device)
> if (err < 0)
> return err;
>
> - platform_profile_handler.ops = &platform_profile_omen_ops;
> + ops = &platform_profile_omen_ops;
> } else if (is_victus_thermal_profile()) {
> err = platform_profile_victus_get_ec(&active_platform_profile);
> if (err < 0)
> @@ -1631,7 +1632,7 @@ static int thermal_profile_setup(struct platform_device *device)
> if (err < 0)
> return err;
>
> - platform_profile_handler.ops = &platform_profile_victus_ops;
> + ops = &platform_profile_victus_ops;
> } else {
> tp = thermal_profile_get();
>
> @@ -1646,15 +1647,13 @@ static int thermal_profile_setup(struct platform_device *device)
> if (err)
> return err;
>
> - platform_profile_handler.ops = &hp_wmi_platform_profile_ops;
> + ops = &hp_wmi_platform_profile_ops;
> }
>
> - platform_profile_handler.name = "hp-wmi";
> - platform_profile_handler.dev = &device->dev;
> -
> - err = devm_platform_profile_register(&platform_profile_handler, NULL);
> - if (err)
> - return err;
> + platform_profile_device = devm_platform_profile_register(
> + &device->dev, "hp-wmi", NULL, ops);
> + if (IS_ERR(platform_profile_device))
> + return PTR_ERR(platform_profile_device);
>
> platform_profile_support = true;
>
> diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
> index d34d565172f5..55aac0190624 100644
> --- a/drivers/platform/x86/ideapad-laptop.c
> +++ b/drivers/platform/x86/ideapad-laptop.c
> @@ -142,7 +142,7 @@ enum {
>
> struct ideapad_dytc_priv {
> enum platform_profile_option current_profile;
> - struct platform_profile_handler pprof;
> + struct device *ppdev; /* platform profile device */
> struct mutex mutex; /* protects the DYTC interface */
> struct ideapad_private *priv;
> };
> @@ -1050,7 +1050,7 @@ static void dytc_profile_refresh(struct ideapad_private *priv)
>
> if (profile != priv->dytc->current_profile) {
> priv->dytc->current_profile = profile;
> - platform_profile_notify(&priv->dytc->pprof);
> + platform_profile_notify(priv->dytc->ppdev);
> }
> }
>
> @@ -1117,15 +1117,15 @@ static int ideapad_dytc_profile_init(struct ideapad_private *priv)
>
> mutex_init(&priv->dytc->mutex);
>
> - priv->dytc->pprof.name = "ideapad-laptop";
> - priv->dytc->pprof.dev = &priv->platform_device->dev;
> priv->dytc->priv = priv;
> - priv->dytc->pprof.ops = &dytc_profile_ops;
>
> /* Create platform_profile structure and register */
> - err = devm_platform_profile_register(&priv->dytc->pprof, &priv->dytc);
> - if (err)
> + priv->dytc->ppdev = devm_platform_profile_register(
> + &priv->platform_device->dev, "ideapad-laptop", &priv->dytc, &dytc_profile_ops);
> + if (IS_ERR(priv->dytc->ppdev)) {
> + err = PTR_ERR(priv->dytc->ppdev);
> goto pp_reg_failed;
> + }
>
> /* Ensure initial values are correct */
> dytc_profile_refresh(priv);
> diff --git a/drivers/platform/x86/inspur_platform_profile.c b/drivers/platform/x86/inspur_platform_profile.c
> index 543e4bce1a57..9e2f24de0207 100644
> --- a/drivers/platform/x86/inspur_platform_profile.c
> +++ b/drivers/platform/x86/inspur_platform_profile.c
> @@ -32,7 +32,7 @@ enum inspur_tmp_profile {
>
> struct inspur_wmi_priv {
> struct wmi_device *wdev;
> - struct platform_profile_handler handler;
> + struct device *ppdev;
> };
>
> static int inspur_wmi_perform_query(struct wmi_device *wdev,
> @@ -190,11 +190,10 @@ static int inspur_wmi_probe(struct wmi_device *wdev, const void *context)
> priv->wdev = wdev;
> dev_set_drvdata(&wdev->dev, priv);
>
> - priv->handler.name = "inspur-wmi";
> - priv->handler.dev = &wdev->dev;
> - priv->handler.ops = &inspur_platform_profile_ops;
> + priv->ppdev = devm_platform_profile_register(
> + &wdev->dev, "inspur-wmi", priv, &inspur_platform_profile_ops);
>
> - return devm_platform_profile_register(&priv->handler, priv);
> + return PTR_ERR_OR_ZERO(priv->ppdev);
> }
>
> static const struct wmi_device_id inspur_wmi_id_table[] = {
> diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
> index a0b8987bc328..964f842ef756 100644
> --- a/drivers/platform/x86/thinkpad_acpi.c
> +++ b/drivers/platform/x86/thinkpad_acpi.c
> @@ -962,6 +962,7 @@ static const struct proc_ops dispatch_proc_ops = {
> static struct platform_device *tpacpi_pdev;
> static struct platform_device *tpacpi_sensors_pdev;
> static struct device *tpacpi_hwmon;
> +static struct device *tpacpi_pprof;
> static struct input_dev *tpacpi_inputdev;
> static struct mutex tpacpi_inputdev_send_mutex;
> static LIST_HEAD(tpacpi_all_drivers);
> @@ -10553,11 +10554,6 @@ static const struct platform_profile_ops dytc_profile_ops = {
> .choices = dytc_profile_choices,
> };
>
> -static struct platform_profile_handler dytc_profile = {
> - .name = "thinkpad-acpi",
> - .ops = &dytc_profile_ops,
> -};
> -
> static void dytc_profile_refresh(void)
> {
> enum platform_profile_option profile;
> @@ -10586,7 +10582,7 @@ static void dytc_profile_refresh(void)
> err = convert_dytc_to_profile(funcmode, perfmode, &profile);
> if (!err && profile != dytc_current_profile) {
> dytc_current_profile = profile;
> - platform_profile_notify(&dytc_profile);
> + platform_profile_notify(tpacpi_pprof);
> }
> }
>
> @@ -10647,14 +10643,14 @@ static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm)
> dbg_printk(TPACPI_DBG_INIT,
> "DYTC version %d: thermal mode available\n", dytc_version);
>
> - dytc_profile.dev = &tpacpi_pdev->dev;
> /* Create platform_profile structure and register */
> - err = devm_platform_profile_register(&dytc_profile, NULL);
> + tpacpi_pprof = devm_platform_profile_register(
> + &tpacpi_pdev->dev, "thinkpad-acpi", NULL, &dytc_profile_ops);
> /*
> * If for some reason platform_profiles aren't enabled
> * don't quit terminally.
> */
> - if (err)
> + if (IS_ERR(tpacpi_pprof))
> return -ENODEV;
>
> /* Ensure initial values are correct */
> diff --git a/include/linux/platform_profile.h b/include/linux/platform_profile.h
> index cadbd3168d84..97ce9bd476ab 100644
> --- a/include/linux/platform_profile.h
> +++ b/include/linux/platform_profile.h
> @@ -47,10 +47,14 @@ struct platform_profile_handler {
> const struct platform_profile_ops *ops;
> };
>
> -int platform_profile_register(struct platform_profile_handler *pprof, void *drvdata);
> -int platform_profile_remove(struct platform_profile_handler *pprof);
> -int devm_platform_profile_register(struct platform_profile_handler *pprof, void *drvdata);
> +struct device *platform_profile_register(struct device *dev, const char *name,
> + void *drvdata,
> + const struct platform_profile_ops *ops);
> +int platform_profile_remove(struct device *dev);
> +struct device *devm_platform_profile_register(struct device *dev, const char *name,
> + void *drvdata,
> + const struct platform_profile_ops *ops);
> int platform_profile_cycle(void);
> -void platform_profile_notify(struct platform_profile_handler *pprof);
> +void platform_profile_notify(struct device *dev);
>
> #endif /*_PLATFORM_PROFILE_H_*/
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