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Message-ID: <1954465.PYKUYFuaPT@kreacher>
Date: Tue, 03 Oct 2023 15:24:12 +0200
From: "Rafael J. Wysocki" <rjw@...ysocki.net>
To: Linux PM <linux-pm@...r.kernel.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
Linux ACPI <linux-acpi@...r.kernel.org>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Zhang Rui <rui.zhang@...el.com>,
Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
"Rafael J. Wysocki" <rafael@...nel.org>
Subject: [PATCH v2 4/6] ACPI: thermal: Use thermal_zone_for_each_trip() for updating trips
From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Rearrange the code handling notifications from the platform firmware
regarding trip point updates to carry out one loop over trip points
instead of two of them by using thermal_zone_for_each_trip() for that,
which is more straightforward than using a combination of
thermal_zone_device_exec() and for_each_thermal_trip(), each with its
own callback function.
No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
v1 -> v2:
* Rebase on top of the previous patches.
* Add active_trip_index() for computing active trip point indices instead
of storing them.
---
drivers/acpi/thermal.c | 78 +++++++++++++++++++++++--------------------------
1 file changed, 37 insertions(+), 41 deletions(-)
Index: linux-pm/drivers/acpi/thermal.c
===================================================================
--- linux-pm.orig/drivers/acpi/thermal.c
+++ linux-pm/drivers/acpi/thermal.c
@@ -177,6 +177,15 @@ static bool acpi_thermal_trip_valid(stru
return acpi_trip->temp_dk != THERMAL_TEMP_INVALID;
}
+static int active_trip_index(struct acpi_thermal *tz,
+ struct acpi_thermal_trip *acpi_trip)
+{
+ struct acpi_thermal_active *active;
+
+ active = container_of(acpi_trip, struct acpi_thermal_active, trip);
+ return active - tz->trips.active;
+}
+
static long get_passive_temp(struct acpi_thermal *tz)
{
unsigned long long tmp;
@@ -213,21 +222,18 @@ static long get_active_temp(struct acpi_
}
static void acpi_thermal_update_trip(struct acpi_thermal *tz,
- int index)
+ const struct thermal_trip *trip)
{
- struct acpi_thermal_trip *acpi_trip;
-
- acpi_trip = index == ACPI_THERMAL_TRIP_PASSIVE ?
- &tz->trips.passive.trip : &tz->trips.active[index].trip;
- if (!acpi_thermal_trip_valid(acpi_trip))
- return;
+ struct acpi_thermal_trip *acpi_trip = trip->priv;
- if (index == ACPI_THERMAL_TRIP_PASSIVE) {
+ if (trip->type == THERMAL_TRIP_PASSIVE) {
if (psv > 0)
return;
acpi_trip->temp_dk = get_passive_temp(tz);
} else {
+ int index = active_trip_index(tz, acpi_trip);
+
acpi_trip->temp_dk = get_active_temp(tz, index);
}
@@ -267,31 +273,39 @@ static bool update_trip_devices(struct a
return true;
}
-static void acpi_thermal_update_trip_devices(struct acpi_thermal *tz, int index)
+static void acpi_thermal_update_trip_devices(struct acpi_thermal *tz,
+ struct thermal_trip *trip)
{
- struct acpi_thermal_trip *acpi_trip;
-
- acpi_trip = index == ACPI_THERMAL_TRIP_PASSIVE ?
- &tz->trips.passive.trip : &tz->trips.active[index].trip;
- if (!acpi_thermal_trip_valid(acpi_trip))
- return;
+ struct acpi_thermal_trip *acpi_trip = trip->priv;
+ int index = trip->type == THERMAL_TRIP_PASSIVE ?
+ ACPI_THERMAL_TRIP_PASSIVE : active_trip_index(tz, acpi_trip);
- if (update_trip_devices(tz, acpi_trip, index, true)) {
+ if (update_trip_devices(tz, acpi_trip, index, true))
return;
- }
acpi_trip->temp_dk = THERMAL_TEMP_INVALID;
ACPI_THERMAL_TRIPS_EXCEPTION(tz, "state");
}
+struct adjust_trip_data {
+ struct acpi_thermal *tz;
+ u32 event;
+};
+
static int acpi_thermal_adjust_trip(struct thermal_trip *trip, void *data)
{
struct acpi_thermal_trip *acpi_trip = trip->priv;
- struct acpi_thermal *tz = data;
+ struct adjust_trip_data *atd = data;
+ struct acpi_thermal *tz = atd->tz;
- if (!acpi_trip)
+ if (!acpi_trip || !acpi_thermal_trip_valid(acpi_trip))
return 0;
+ if (atd->event == ACPI_THERMAL_NOTIFY_THRESHOLDS)
+ acpi_thermal_update_trip(tz, trip);
+ else
+ acpi_thermal_update_trip_devices(tz, trip);
+
if (acpi_thermal_trip_valid(acpi_trip))
trip->temperature = acpi_thermal_temp(tz, acpi_trip->temp_dk);
else
@@ -300,25 +314,6 @@ static int acpi_thermal_adjust_trip(stru
return 0;
}
-static void acpi_thermal_adjust_thermal_zone(struct thermal_zone_device *thermal,
- unsigned long data)
-{
- struct acpi_thermal *tz = thermal_zone_device_priv(thermal);
- int i;
-
- if (data == ACPI_THERMAL_NOTIFY_THRESHOLDS) {
- acpi_thermal_update_trip(tz, ACPI_THERMAL_TRIP_PASSIVE);
- for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
- acpi_thermal_update_trip(tz, i);
- } else {
- acpi_thermal_update_trip_devices(tz, ACPI_THERMAL_TRIP_PASSIVE);
- for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++)
- acpi_thermal_update_trip_devices(tz, i);
- }
-
- for_each_thermal_trip(tz->thermal_zone, acpi_thermal_adjust_trip, tz);
-}
-
static void acpi_queue_thermal_check(struct acpi_thermal *tz)
{
if (!work_pending(&tz->thermal_check_work))
@@ -327,17 +322,18 @@ static void acpi_queue_thermal_check(str
static void acpi_thermal_trips_update(struct acpi_thermal *tz, u32 event)
{
+ struct adjust_trip_data atd = { .tz = tz, .event = event };
struct acpi_device *adev = tz->device;
/*
- * Use thermal_zone_device_exec() to carry out the trip points
+ * Use thermal_zone_for_each_trip() to carry out the trip points
* update, so as to protect thermal_get_trend() from getting stale
* trip point temperatures and to prevent thermal_zone_device_update()
* invoked from acpi_thermal_check_fn() from producing inconsistent
* results.
*/
- thermal_zone_device_exec(tz->thermal_zone,
- acpi_thermal_adjust_thermal_zone, event);
+ thermal_zone_for_each_trip(tz->thermal_zone,
+ acpi_thermal_adjust_trip, &atd);
acpi_queue_thermal_check(tz);
acpi_bus_generate_netlink_event(adev->pnp.device_class,
dev_name(&adev->dev), event, 0);
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