1 files changed, 65 insertions, 74 deletions

diff --git a/drivers/thermal/thermal_netlink.c b/drivers/thermal/thermal_netlink.c
index 08bc46c3ec..76a231a296 100644
--- a/drivers/thermal/thermal_netlink.c
+++ b/drivers/thermal/thermal_netlink.c
@@ -13,9 +13,14 @@
 
 #include "thermal_core.h"
 
+enum thermal_genl_multicast_groups {
+	THERMAL_GENL_SAMPLING_GROUP = 0,
+	THERMAL_GENL_EVENT_GROUP = 1,
+};
+
 static const struct genl_multicast_group thermal_genl_mcgrps[] = {
-	{ .name = THERMAL_GENL_SAMPLING_GROUP_NAME, },
-	{ .name = THERMAL_GENL_EVENT_GROUP_NAME,  },
+	[THERMAL_GENL_SAMPLING_GROUP] = { .name = THERMAL_GENL_SAMPLING_GROUP_NAME, },
+	[THERMAL_GENL_EVENT_GROUP]  = { .name = THERMAL_GENL_EVENT_GROUP_NAME,  },
 };
 
 static const struct nla_policy thermal_genl_policy[THERMAL_GENL_ATTR_MAX + 1] = {
@@ -71,6 +76,11 @@ typedef int (*cb_t)(struct param *);
 
 static struct genl_family thermal_gnl_family;
 
+static int thermal_group_has_listeners(enum thermal_genl_multicast_groups group)
+{
+	return genl_has_listeners(&thermal_gnl_family, &init_net, group);
+}
+
 /************************** Sampling encoding *******************************/
 
 int thermal_genl_sampling_temp(int id, int temp)
@@ -78,6 +88,9 @@ int thermal_genl_sampling_temp(int id, int temp)
 	struct sk_buff *skb;
 	void *hdr;
 
+	if (!thermal_group_has_listeners(THERMAL_GENL_SAMPLING_GROUP))
+		return 0;
+
 	skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
 	if (!skb)
 		return -ENOMEM;
@@ -95,7 +108,7 @@ int thermal_genl_sampling_temp(int id, int temp)
 
 	genlmsg_end(skb, hdr);
 
-	genlmsg_multicast(&thermal_gnl_family, skb, 0, 0, GFP_KERNEL);
+	genlmsg_multicast(&thermal_gnl_family, skb, 0, THERMAL_GENL_SAMPLING_GROUP, GFP_KERNEL);
 
 	return 0;
 out_cancel:
@@ -135,7 +148,7 @@ static int thermal_genl_event_tz_trip_up(struct param *p)
 	return 0;
 }
 
-static int thermal_genl_event_tz_trip_add(struct param *p)
+static int thermal_genl_event_tz_trip_change(struct param *p)
 {
 	if (nla_put_u32(p->msg, THERMAL_GENL_ATTR_TZ_ID, p->tz_id) ||
 	    nla_put_u32(p->msg, THERMAL_GENL_ATTR_TZ_TRIP_ID, p->trip_id) ||
@@ -147,15 +160,6 @@ static int thermal_genl_event_tz_trip_add(struct param *p)
 	return 0;
 }
 
-static int thermal_genl_event_tz_trip_delete(struct param *p)
-{
-	if (nla_put_u32(p->msg, THERMAL_GENL_ATTR_TZ_ID, p->tz_id) ||
-	    nla_put_u32(p->msg, THERMAL_GENL_ATTR_TZ_TRIP_ID, p->trip_id))
-		return -EMSGSIZE;
-
-	return 0;
-}
-
 static int thermal_genl_event_cdev_add(struct param *p)
 {
 	if (nla_put_string(p->msg, THERMAL_GENL_ATTR_CDEV_NAME,
@@ -245,9 +249,6 @@ int thermal_genl_event_tz_disable(struct param *p)
 int thermal_genl_event_tz_trip_down(struct param *p)
 	__attribute__((alias("thermal_genl_event_tz_trip_up")));
 
-int thermal_genl_event_tz_trip_change(struct param *p)
-	__attribute__((alias("thermal_genl_event_tz_trip_add")));
-
 static cb_t event_cb[] = {
 	[THERMAL_GENL_EVENT_TZ_CREATE]		= thermal_genl_event_tz_create,
 	[THERMAL_GENL_EVENT_TZ_DELETE]		= thermal_genl_event_tz_delete,
@@ -256,8 +257,6 @@ static cb_t event_cb[] = {
 	[THERMAL_GENL_EVENT_TZ_TRIP_UP]		= thermal_genl_event_tz_trip_up,
 	[THERMAL_GENL_EVENT_TZ_TRIP_DOWN]	= thermal_genl_event_tz_trip_down,
 	[THERMAL_GENL_EVENT_TZ_TRIP_CHANGE]	= thermal_genl_event_tz_trip_change,
-	[THERMAL_GENL_EVENT_TZ_TRIP_ADD]	= thermal_genl_event_tz_trip_add,
-	[THERMAL_GENL_EVENT_TZ_TRIP_DELETE]	= thermal_genl_event_tz_trip_delete,
 	[THERMAL_GENL_EVENT_CDEV_ADD]		= thermal_genl_event_cdev_add,
 	[THERMAL_GENL_EVENT_CDEV_DELETE]	= thermal_genl_event_cdev_delete,
 	[THERMAL_GENL_EVENT_CDEV_STATE_UPDATE]	= thermal_genl_event_cdev_state_update,
@@ -275,6 +274,9 @@ static int thermal_genl_send_event(enum thermal_genl_event event,
 	int ret = -EMSGSIZE;
 	void *hdr;
 
+	if (!thermal_group_has_listeners(THERMAL_GENL_EVENT_GROUP))
+		return 0;
+
 	msg = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
 	if (!msg)
 		return -ENOMEM;
@@ -290,7 +292,7 @@ static int thermal_genl_send_event(enum thermal_genl_event event,
 
 	genlmsg_end(msg, hdr);
 
-	genlmsg_multicast(&thermal_gnl_family, msg, 0, 1, GFP_KERNEL);
+	genlmsg_multicast(&thermal_gnl_family, msg, 0, THERMAL_GENL_EVENT_GROUP, GFP_KERNEL);
 
 	return 0;
 
@@ -302,100 +304,93 @@ out_free_msg:
 	return ret;
 }
 
-int thermal_notify_tz_create(int tz_id, const char *name)
+int thermal_notify_tz_create(const struct thermal_zone_device *tz)
 {
-	struct param p = { .tz_id = tz_id, .name = name };
+	struct param p = { .tz_id = tz->id, .name = tz->type };
 
 	return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_CREATE, &p);
 }
 
-int thermal_notify_tz_delete(int tz_id)
+int thermal_notify_tz_delete(const struct thermal_zone_device *tz)
 {
-	struct param p = { .tz_id = tz_id };
+	struct param p = { .tz_id = tz->id };
 
 	return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_DELETE, &p);
 }
 
-int thermal_notify_tz_enable(int tz_id)
+int thermal_notify_tz_enable(const struct thermal_zone_device *tz)
 {
-	struct param p = { .tz_id = tz_id };
+	struct param p = { .tz_id = tz->id };
 
 	return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_ENABLE, &p);
 }
 
-int thermal_notify_tz_disable(int tz_id)
+int thermal_notify_tz_disable(const struct thermal_zone_device *tz)
 {
-	struct param p = { .tz_id = tz_id };
+	struct param p = { .tz_id = tz->id };
 
 	return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_DISABLE, &p);
 }
 
-int thermal_notify_tz_trip_down(int tz_id, int trip_id, int temp)
+int thermal_notify_tz_trip_down(const struct thermal_zone_device *tz,
+				const struct thermal_trip *trip)
 {
-	struct param p = { .tz_id = tz_id, .trip_id = trip_id, .temp = temp };
+	struct param p = { .tz_id = tz->id,
+			   .trip_id = thermal_zone_trip_id(tz, trip),
+			   .temp = tz->temperature };
 
 	return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_TRIP_DOWN, &p);
 }
 
-int thermal_notify_tz_trip_up(int tz_id, int trip_id, int temp)
+int thermal_notify_tz_trip_up(const struct thermal_zone_device *tz,
+			      const struct thermal_trip *trip)
 {
-	struct param p = { .tz_id = tz_id, .trip_id = trip_id, .temp = temp };
+	struct param p = { .tz_id = tz->id,
+			   .trip_id = thermal_zone_trip_id(tz, trip),
+			   .temp = tz->temperature };
 
 	return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_TRIP_UP, &p);
 }
 
-int thermal_notify_tz_trip_add(int tz_id, int trip_id, int trip_type,
-			       int trip_temp, int trip_hyst)
+int thermal_notify_tz_trip_change(const struct thermal_zone_device *tz,
+				  const struct thermal_trip *trip)
 {
-	struct param p = { .tz_id = tz_id, .trip_id = trip_id,
-			   .trip_type = trip_type, .trip_temp = trip_temp,
-			   .trip_hyst = trip_hyst };
-
-	return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_TRIP_ADD, &p);
-}
-
-int thermal_notify_tz_trip_delete(int tz_id, int trip_id)
-{
-	struct param p = { .tz_id = tz_id, .trip_id = trip_id };
-
-	return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_TRIP_DELETE, &p);
-}
-
-int thermal_notify_tz_trip_change(int tz_id, int trip_id, int trip_type,
-				  int trip_temp, int trip_hyst)
-{
-	struct param p = { .tz_id = tz_id, .trip_id = trip_id,
-			   .trip_type = trip_type, .trip_temp = trip_temp,
-			   .trip_hyst = trip_hyst };
+	struct param p = { .tz_id = tz->id,
+			   .trip_id = thermal_zone_trip_id(tz, trip),
+			   .trip_type = trip->type,
+			   .trip_temp = trip->temperature,
+			   .trip_hyst = trip->hysteresis };
 
 	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);
 }
 
-int thermal_notify_tz_gov_change(int tz_id, const char *name)
+int thermal_notify_tz_gov_change(const struct thermal_zone_device *tz,
+				 const char *name)
 {
-	struct param p = { .tz_id = tz_id, .name = name };
+	struct param p = { .tz_id = tz->id, .name = name };
 
 	return thermal_genl_send_event(THERMAL_GENL_EVENT_TZ_GOV_CHANGE, &p);
 }
@@ -450,10 +445,10 @@ out_cancel_nest:
 static int thermal_genl_cmd_tz_get_trip(struct param *p)
 {
 	struct sk_buff *msg = p->msg;
+	const struct thermal_trip *trip;
 	struct thermal_zone_device *tz;
 	struct nlattr *start_trip;
-	struct thermal_trip trip;
-	int ret, i, id;
+	int id;
 
 	if (!p->attrs[THERMAL_GENL_ATTR_TZ_ID])
 		return -EINVAL;
@@ -470,16 +465,12 @@ static int thermal_genl_cmd_tz_get_trip(struct param *p)
 
 	mutex_lock(&tz->lock);
 
-	for (i = 0; i < tz->num_trips; i++) {
-
-		ret = __thermal_zone_get_trip(tz, i, &trip);
-		if (ret)
-			goto out_cancel_nest;
-
-		if (nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_ID, i) ||
-		    nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_TYPE, trip.type) ||
-		    nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_TEMP, trip.temperature) ||
-		    nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_HYST, trip.hysteresis))
+	for_each_trip(tz, trip) {
+		if (nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_ID,
+				thermal_zone_trip_id(tz, trip)) ||
+		    nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_TYPE, trip->type) ||
+		    nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_TEMP, trip->temperature) ||
+		    nla_put_u32(msg, THERMAL_GENL_ATTR_TZ_TRIP_HYST, trip->hysteresis))
 			goto out_cancel_nest;
 	}