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-rw-r--r--drivers/acpi/thermal.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 9063239e0b13..6a0329340b42 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -475,14 +475,14 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
break;
}
- if (flag & ACPI_TRIPS_DEVICES) {
- memset(&devices, 0, sizeof(struct acpi_handle_list));
+ if ((flag & ACPI_TRIPS_DEVICES)
+ && acpi_has_method(tz->device->handle, "_TZD")) {
+ memset(&devices, 0, sizeof(devices));
status = acpi_evaluate_reference(tz->device->handle, "_TZD",
NULL, &devices);
- if (memcmp(&tz->devices, &devices,
- sizeof(struct acpi_handle_list))) {
- memcpy(&tz->devices, &devices,
- sizeof(struct acpi_handle_list));
+ if (ACPI_SUCCESS(status)
+ && memcmp(&tz->devices, &devices, sizeof(devices))) {
+ tz->devices = devices;
ACPI_THERMAL_TRIPS_EXCEPTION(flag, "device");
}
}