diff options
| author | Thomas Renninger <trenn@suse.de> | 2010-02-17 00:55:51 +0300 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2010-02-19 09:48:48 +0300 |
| commit | 8b7ef6d8f16274da42344cd50746ddb1c93c25ea (patch) | |
| tree | ddb90374556693b5173b2610821e6bdd60845af8 /drivers/acpi/thermal.c | |
| parent | f8b55f251012e104093e105483c45c5d85ad3040 (diff) | |
| download | linux-8b7ef6d8f16274da42344cd50746ddb1c93c25ea.tar.xz | |
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: Thomas Renninger <trenn@suse.de>
Tested-by: clarkt@cnsp.com
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/thermal.c')
| -rw-r--r-- | 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 9073ada88835..e9f28e075cf8 100644 --- a/drivers/acpi/thermal.c +++ b/drivers/acpi/thermal.c @@ -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) { - 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) |