linux-kernel - [PATCH v1 1/2] thermal: netlink: Rework notify API for cooling devices

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Date: Tue, 09 Jan 2024 17:42:04 +0100
From: "Rafael J. Wysocki" <rjw@...ysocki.net>
To: Linux PM <linux-pm@...r.kernel.org>
Cc: Daniel Lezcano <daniel.lezcano@...aro.org>, Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>, Zhang Rui <rui.zhang@...el.com>, LKML <linux-kernel@...r.kernel.org>, Lukasz Luba <lukasz.luba@....com>
Subject: [PATCH v1 1/2] thermal: netlink: Rework notify API for cooling devices

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

In analogy with some previous thermal netlink API changes, redefine
thermal_notify_cdev_state_update(), thermal_notify_cdev_add() and
thermal_notify_cdev_delete() to take a const cdev pointer as their
first argument and let them extract the requisite information from
there by themselves.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 drivers/thermal/thermal_helpers.c |    2 +-
 drivers/thermal/thermal_netlink.c |   15 ++++++++-------
 drivers/thermal/thermal_netlink.h |   16 +++++++++-------
 3 files changed, 18 insertions(+), 15 deletions(-)

Index: linux-pm/drivers/thermal/thermal_netlink.h
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_netlink.h
+++ linux-pm/drivers/thermal/thermal_netlink.h
@@ -12,6 +12,7 @@ struct thermal_genl_cpu_caps {
 
 struct thermal_zone_device;
 struct thermal_trip;
+struct thermal_cooling_device;
 
 /* Netlink notification function */
 #ifdef CONFIG_THERMAL_NETLINK
@@ -27,9 +28,10 @@ int thermal_notify_tz_trip_up(const stru
 			      const struct thermal_trip *trip);
 int thermal_notify_tz_trip_change(const struct thermal_zone_device *tz,
 				  const struct thermal_trip *trip);
-int thermal_notify_cdev_state_update(int cdev_id, int state);
-int thermal_notify_cdev_add(int cdev_id, const char *name, int max_state);
-int thermal_notify_cdev_delete(int cdev_id);
+int thermal_notify_cdev_state_update(const struct thermal_cooling_device *cdev,
+				     int state);
+int thermal_notify_cdev_add(const struct thermal_cooling_device *cdev);
+int thermal_notify_cdev_delete(const struct thermal_cooling_device *cdev);
 int thermal_notify_tz_gov_change(const struct thermal_zone_device *tz,
 				 const char *name);
 int thermal_genl_sampling_temp(int id, int temp);
@@ -79,18 +81,18 @@ static inline int thermal_notify_tz_trip
 	return 0;
 }
 
-static inline int thermal_notify_cdev_state_update(int cdev_id, int state)
+static inline int thermal_notify_cdev_state_update(const struct thermal_cooling_device *cdev,
+						   int state)
 {
 	return 0;
 }
 
-static inline int thermal_notify_cdev_add(int cdev_id, const char *name,
-					  int max_state)
+static inline int thermal_notify_cdev_add(const struct thermal_cooling_device *cdev)
 {
 	return 0;
 }
 
-static inline int thermal_notify_cdev_delete(int cdev_id)
+static inline int thermal_notify_cdev_delete(const struct thermal_cooling_device *cdev)
 {
 	return 0;
 }
Index: linux-pm/drivers/thermal/thermal_netlink.c
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_netlink.c
+++ linux-pm/drivers/thermal/thermal_netlink.c
@@ -364,24 +364,25 @@ int thermal_notify_tz_trip_change(const
 	return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_TRIP_CHANGE, &p);
 }
 
-int thermal_notify_cdev_state_update(int cdev_id, int cdev_state)
+int thermal_notify_cdev_state_update(const struct thermal_cooling_device *cdev,
+				     int state)
 {
-	struct param p = { .cdev_id = cdev_id, .cdev_state = cdev_state };
+	struct param p = { .cdev_id = cdev->id, .cdev_state = state };
 
 	return thermal_genl_send_event(THERMAL_GENL_EVENT_CDEV_STATE_UPDATE, &p);
 }
 
-int thermal_notify_cdev_add(int cdev_id, const char *name, int cdev_max_state)
+int thermal_notify_cdev_add(const struct thermal_cooling_device *cdev)
 {
-	struct param p = { .cdev_id = cdev_id, .name = name,
-			   .cdev_max_state = cdev_max_state };
+	struct param p = { .cdev_id = cdev->id, .name = cdev->type,
+			   .cdev_max_state = cdev->max_state };
 
 	return thermal_genl_send_event(THERMAL_GENL_EVENT_CDEV_ADD, &p);
 }
 
-int thermal_notify_cdev_delete(int cdev_id)
+int thermal_notify_cdev_delete(const struct thermal_cooling_device *cdev)
 {
-	struct param p = { .cdev_id = cdev_id };
+	struct param p = { .cdev_id = cdev->id };
 
 	return thermal_genl_send_event(THERMAL_GENL_EVENT_CDEV_DELETE, &p);
 }
Index: linux-pm/drivers/thermal/thermal_helpers.c
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_helpers.c
+++ linux-pm/drivers/thermal/thermal_helpers.c
@@ -156,7 +156,7 @@ static int thermal_cdev_set_cur_state(st
 	 */
 	ret = cdev->ops->set_cur_state(cdev, state);
 	if (!ret) {
-		thermal_notify_cdev_state_update(cdev->id, state);
+		thermal_notify_cdev_state_update(cdev, state);
 		thermal_cooling_device_stats_update(cdev, state);
 		thermal_debug_cdev_state_update(cdev, state);
 	}