ACPI spec says (11.5 Thermal Zone Interface Requirements): A thermal zone must contain at least one trip point (critical, near critical, active, or passive) Check this once at init time. Signed-off-by: Thomas Renninger <trenn@xxxxxxx> Tested-by: clarkt@xxxxxxxx CC: Len Brown <lenb@xxxxxxxxxx> CC: linux-acpi@xxxxxxxxxxxxxxx --- drivers/acpi/thermal.c | 18 +++++++++++++++++- 1 files changed, 17 insertions(+), 1 deletions(-) diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index 8fa71b8..09b757a 100644 --- a/drivers/acpi/thermal.c +++ b/drivers/acpi/thermal.c @@ -577,7 +577,23 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) static int acpi_thermal_get_trip_points(struct acpi_thermal *tz) { - return acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); + int i, valid, ret = acpi_thermal_trips_update(tz, ACPI_TRIPS_INIT); + + if (ret) + return ret; + + valid = tz->trips.critical.flags.valid | + tz->trips.hot.flags.valid | + tz->trips.passive.flags.valid; + + for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE; i++) + valid |= tz->trips.active[i].flags.valid; + + if (!valid) { + printk(KERN_WARNING FW_BUG "No valid trip found\n"); + return -ENODEV; + } + return 0; } static void acpi_thermal_check(void *data) -- 1.6.3 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html