From 8a81cf96f5510aaf9a65d103f7405079a7b0fcc5 Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Thu, 7 Sep 2023 11:55:18 +0200 Subject: [PATCH 1/3] thermal/of: add missing of_node_put() for_each_child_of_node performs an of_node_get on each iteration, so a break out of the loop requires an of_node_put. This was done using the Coccinelle semantic patch iterators/for_each_child.cocci Signed-off-by: Julia Lawall Signed-off-by: Rafael J. Wysocki --- drivers/thermal/thermal_of.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c index 4ca905723429..1e0655b63259 100644 --- a/drivers/thermal/thermal_of.c +++ b/drivers/thermal/thermal_of.c @@ -37,8 +37,10 @@ static int of_find_trip_id(struct device_node *np, struct device_node *trip) */ for_each_child_of_node(trips, t) { - if (t == trip) + if (t == trip) { + of_node_put(t); goto out; + } i++; } @@ -401,8 +403,10 @@ static int thermal_of_for_each_cooling_maps(struct thermal_zone_device *tz, for_each_child_of_node(cm_np, child) { ret = thermal_of_for_each_cooling_device(tz_np, child, tz, cdev, action); - if (ret) + if (ret) { + of_node_put(child); break; + } } of_node_put(cm_np); From ebc7abb35b258152d4a424f89d7c03db1d7ce61c Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Thu, 7 Sep 2023 20:18:56 +0200 Subject: [PATCH 2/3] thermal: Constify the trip argument of the .get_trend() zone callback Add 'const' to the definition of the 'trip' argument of the .get_trend() thermal zone callback to indicate that the trip point passed to it should not be modified by it and adjust the callback functions implementing it, thermal_get_trend() in the ACPI thermal driver and __ti_thermal_get_trend(), accordingly. No intentional functional impact. Signed-off-by: Rafael J. Wysocki Reviewed-by: Michal Wilczynski --- drivers/acpi/thermal.c | 2 +- drivers/thermal/ti-soc-thermal/ti-thermal-common.c | 3 ++- include/linux/thermal.h | 4 ++-- 3 files changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index f14e68266ccd..312730f8272e 100644 --- a/drivers/acpi/thermal.c +++ b/drivers/acpi/thermal.c @@ -492,7 +492,7 @@ static int thermal_get_temp(struct thermal_zone_device *thermal, int *temp) } static int thermal_get_trend(struct thermal_zone_device *thermal, - struct thermal_trip *trip, + const struct thermal_trip *trip, enum thermal_trend *trend) { struct acpi_thermal *tz = thermal_zone_device_priv(thermal); diff --git a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c index 6ba2613627e1..0cf0826b805a 100644 --- a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c +++ b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c @@ -110,7 +110,8 @@ static inline int __ti_thermal_get_temp(struct thermal_zone_device *tz, int *tem } static int __ti_thermal_get_trend(struct thermal_zone_device *tz, - struct thermal_trip *trip, enum thermal_trend *trend) + const struct thermal_trip *trip, + enum thermal_trend *trend) { struct ti_thermal_data *data = thermal_zone_device_priv(tz); struct ti_bandgap *bgp; diff --git a/include/linux/thermal.h b/include/linux/thermal.h index c99440aac1a1..a5ae4af955ff 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -80,8 +80,8 @@ struct thermal_zone_device_ops { int (*set_trip_hyst) (struct thermal_zone_device *, int, int); int (*get_crit_temp) (struct thermal_zone_device *, int *); int (*set_emul_temp) (struct thermal_zone_device *, int); - int (*get_trend) (struct thermal_zone_device *, struct thermal_trip *, - enum thermal_trend *); + int (*get_trend) (struct thermal_zone_device *, + const struct thermal_trip *, enum thermal_trend *); void (*hot)(struct thermal_zone_device *); void (*critical)(struct thermal_zone_device *); }; From fb2c10245f201278804a6f28e196e95436059d6d Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Thu, 14 Sep 2023 21:42:20 +0200 Subject: [PATCH 3/3] thermal: core: Fix disabled trip point check in handle_thermal_trip() Commit bc840ea5f9a9 ("thermal: core: Do not handle trip points with invalid temperature") added a check for invalid temperature to the disabled trip point check in handle_thermal_trip(), but that check was added at a point when the trip structure has not been initialized yet. This may cause handle_thermal_trip() to skip a valid trip point in some cases, so fix it by moving the check to a suitable place, after __thermal_zone_get_trip() has been called to populate the trip structure. Fixes: bc840ea5f9a9 ("thermal: core: Do not handle trip points with invalid temperature") Signed-off-by: Rafael J. Wysocki --- drivers/thermal/thermal_core.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index 8717a3343512..58533ea75cd9 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -348,12 +348,14 @@ static void handle_thermal_trip(struct thermal_zone_device *tz, int trip_id) struct thermal_trip trip; /* Ignore disabled trip points */ - if (test_bit(trip_id, &tz->trips_disabled) || - trip.temperature == THERMAL_TEMP_INVALID) + if (test_bit(trip_id, &tz->trips_disabled)) return; __thermal_zone_get_trip(tz, trip_id, &trip); + if (trip.temperature == THERMAL_TEMP_INVALID) + return; + if (tz->last_temperature != THERMAL_TEMP_INVALID) { if (tz->last_temperature < trip.temperature && tz->temperature >= trip.temperature)