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Commit 8b7ef6d8 authored by Thomas Renninger's avatar Thomas Renninger Committed by Len Brown
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ACPI thermal: Check for thermal zone requirement 



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: default avatarThomas Renninger <trenn@suse.de>
Tested-by: default avatar <clarkt@cnsp.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent f8b55f25

drivers/acpi/thermal.c

+17 −1
Original line number Original line Diff line number Diff line
@@ -575,7 +575,23 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag) 




static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)

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)

static void acpi_thermal_check(void *data)