[PATCH v1 6/6] thermal: intel: Adjust ops handling during thermal zone registration

Rafael J. Wysocki
2024-02-05T21:21:13Z

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

Because thermal zone operations are now stored directly in struct
thermal_zone_device, thermal zone creators can discard the operations
structure after the zone registration is complete, or it can be made
read-only.

Accordingly, make int340x_thermal_zone_add() use a local variable to
represent thermal zone operations, so it is freed automatically upon the
function exit, and make the other Intel thermal drivers use const zone
operations structures.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c | 26 ++--------
drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h | 1
drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c | 2
drivers/thermal/intel/intel_pch_thermal.c | 2
drivers/thermal/intel/intel_quark_dts_thermal.c | 2
drivers/thermal/intel/intel_soc_dts_iosf.c | 2
drivers/thermal/intel/x86_pkg_temp_thermal.c | 2
7 files changed, 11 insertions(+), 26 deletions(-)

Index: linux-pm/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
===================================================================
--- linux-pm.orig/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
+++ linux-pm/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
@@ -61,12 +61,6 @@ static void int340x_thermal_critical(str
dev_dbg(&zone->device, "%s: critical temperature reached\n", zone->type);
}

-static struct thermal_zone_device_ops int340x_thermal_zone_ops = {
- .get_temp = int340x_thermal_get_zone_temp,
- .set_trip_temp = int340x_thermal_set_trip_temp,
- .critical = int340x_thermal_critical,
-};
-
static inline void *int_to_trip_priv(int i)
{
return (void *)(long)i;
@@ -126,6 +120,11 @@ static struct thermal_zone_params int340
struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
int (*get_temp) (struct thermal_zone_device *, int *))
{
+ const struct thermal_zone_device_ops zone_ops = {
+ .set_trip_temp = int340x_thermal_set_trip_temp,
+ .critical = int340x_thermal_critical,
+ .get_temp = get_temp ? get_temp : int340x_thermal_get_zone_temp,
+ };
struct int34x_thermal_zone *int34x_zone;
struct thermal_trip *zone_trips;
unsigned long long trip_cnt = 0;
@@ -140,16 +139,6 @@ struct int34x_thermal_zone *int340x_ther

int34x_zone->adev = adev;

- int34x_zone->ops = kmemdup(&int340x_thermal_zone_ops,
- sizeof(int340x_thermal_zone_ops), GFP_KERNEL);
- if (!int34x_zone->ops) {
- ret = -ENOMEM;
- goto err_ops_alloc;
- }
-
- if (get_temp)
- int34x_zone->ops->get_temp = get_temp;
-
status = acpi_evaluate_integer(adev->handle, "PATC", NULL, &trip_cnt);
if (ACPI_SUCCESS(status)) {
int34x_zone->aux_trip_nr = trip_cnt;
@@ -185,7 +174,7 @@ struct int34x_thermal_zone *int340x_ther
acpi_device_bid(adev),
zone_trips, trip_cnt,
trip_mask, int34x_zone,
- int34x_zone->ops,
+ &zone_ops,
&int340x_thermal_params,
0, 0);
kfree(zone_trips);
@@ -205,8 +194,6 @@ err_enable:
err_thermal_zone:
acpi_lpat_free_conversion_table(int34x_zone->lpat_table);
err_trips_alloc:
- kfree(int34x_zone->ops);
-err_ops_alloc:
kfree(int34x_zone);
return ERR_PTR(ret);
}
@@ -216,7 +203,6 @@ void int340x_thermal_zone_remove(struct
{
thermal_zone_device_unregister(int34x_zone->zone);
acpi_lpat_free_conversion_table(int34x_zone->lpat_table);
- kfree(int34x_zone->ops);
kfree(int34x_zone);
}
EXPORT_SYMBOL_GPL(int340x_thermal_zone_remove);
Index: linux-pm/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h
===================================================================
--- linux-pm.orig/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h
+++ linux-pm/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h
@@ -22,7 +22,6 @@ struct int34x_thermal_zone {
struct acpi_device *adev;
int aux_trip_nr;
struct thermal_zone_device *zone;
- struct thermal_zone_device_ops *ops;
void *priv_data;
struct acpi_lpat_conversion_table *lpat_table;
};
Index: linux-pm/drivers/thermal/intel/intel_pch_thermal.c
===================================================================
--- linux-pm.orig/drivers/thermal/intel/intel_pch_thermal.c
+++ linux-pm/drivers/thermal/intel/intel_pch_thermal.c
@@ -131,7 +131,7 @@ static void pch_critical(struct thermal_
thermal_zone_device_type(tzd));
}

-static struct thermal_zone_device_ops tzd_ops = {
+static const struct thermal_zone_device_ops tzd_ops = {
.get_temp = pch_thermal_get_temp,
.critical = pch_critical,
};
Index: linux-pm/drivers/thermal/intel/intel_quark_dts_thermal.c
===================================================================
--- linux-pm.orig/drivers/thermal/intel/intel_quark_dts_thermal.c
+++ linux-pm/drivers/thermal/intel/intel_quark_dts_thermal.c
@@ -292,7 +292,7 @@ static int sys_change_mode(struct therma
return ret;
}

-static struct thermal_zone_device_ops tzone_ops = {
+static const struct thermal_zone_device_ops tzone_ops = {
.get_temp = sys_get_curr_temp,
.set_trip_temp = sys_set_trip_temp,
.change_mode = sys_change_mode,
Index: linux-pm/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
===================================================================
--- linux-pm.orig/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
+++ linux-pm/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c
@@ -233,7 +233,7 @@ static int get_trip_temp(struct proc_the
return temp;
}

-static struct thermal_zone_device_ops tzone_ops = {
+static const struct thermal_zone_device_ops tzone_ops = {
.get_temp = sys_get_curr_temp,
.set_trip_temp = sys_set_trip_temp,
};
Index: linux-pm/drivers/thermal/intel/intel_soc_dts_iosf.c
===================================================================
--- linux-pm.orig/drivers/thermal/intel/intel_soc_dts_iosf.c
+++ linux-pm/drivers/thermal/intel/intel_soc_dts_iosf.c
@@ -168,7 +168,7 @@ static int sys_get_curr_temp(struct ther
return 0;
}

-static struct thermal_zone_device_ops tzone_ops = {
+static const struct thermal_zone_device_ops tzone_ops = {
.get_temp = sys_get_curr_temp,
.set_trip_temp = sys_set_trip_temp,
};
Index: linux-pm/drivers/thermal/intel/x86_pkg_temp_thermal.c
===================================================================
--- linux-pm.orig/drivers/thermal/intel/x86_pkg_temp_thermal.c
+++ linux-pm/drivers/thermal/intel/x86_pkg_temp_thermal.c
@@ -166,7 +166,7 @@ sys_set_trip_temp(struct thermal_zone_de
}

/* Thermal zone callback registry */
-static struct thermal_zone_device_ops tzone_ops = {
+static const struct thermal_zone_device_ops tzone_ops = {
.get_temp = sys_get_curr_temp,
.set_trip_temp = sys_set_trip_temp,
};