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authorZhang Rui <rui.zhang@intel.com>2009-01-16 20:53:42 +0300
committerLen Brown <len.brown@intel.com>2009-01-16 22:13:12 +0300
commit0e4240d94628530a912d216cad1e32d2e3827327 (patch)
tree6c0e965923e5e761a5df7f981209292a808d4f0e /drivers/acpi/thermal.c
parentc59765042f53a79a7a65585042ff463b69cb248c (diff)
downloadlinux-0e4240d94628530a912d216cad1e32d2e3827327.tar.xz
thermal fixup for broken BIOS which has invalid trip points.
ACPI thermal driver only re-evaluate VALID trip points. For the broken BIOS show in http://bugzilla.kernel.org/show_bug.cgi?id=8544 the active[0] is set to invalid at boot time and it will not be re-evaluated again. We can still get a single warning message at boot time. http://marc.info/?l=linux-kernel&m=120496222629983&w=2 http://bugzilla.kernel.org/show_bug.cgi?id=12203 Signed-off-by: Zhang Rui<rui.zhang@intel.com> Tested-by: Márton Németh <nm127@freemail.hu> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/thermal.c')
-rw-r--r--drivers/acpi/thermal.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 073ff09218a9..99e6f1f8ea45 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -416,7 +416,8 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
}
/* Passive (optional) */
- if (flag & ACPI_TRIPS_PASSIVE) {
+ if (((flag & ACPI_TRIPS_PASSIVE) && tz->trips.passive.flags.valid) ||
+ (flag == ACPI_TRIPS_INIT)) {
valid = tz->trips.passive.flags.valid;
if (psv == -1) {
status = AE_SUPPORT;
@@ -462,8 +463,11 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
memset(&devices, 0, sizeof(struct acpi_handle_list));
status = acpi_evaluate_reference(tz->device->handle, "_PSL",
NULL, &devices);
- if (ACPI_FAILURE(status))
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_WARNING PREFIX
+ "Invalid passive threshold\n");
tz->trips.passive.flags.valid = 0;
+ }
else
tz->trips.passive.flags.valid = 1;
@@ -487,7 +491,8 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
if (act == -1)
break; /* disable all active trip points */
- if (flag & ACPI_TRIPS_ACTIVE) {
+ if ((flag == ACPI_TRIPS_INIT) || ((flag & ACPI_TRIPS_ACTIVE) &&
+ tz->trips.active[i].flags.valid)) {
status = acpi_evaluate_integer(tz->device->handle,
name, NULL, &tmp);
if (ACPI_FAILURE(status)) {
@@ -521,8 +526,11 @@ static int acpi_thermal_trips_update(struct acpi_thermal *tz, int flag)
memset(&devices, 0, sizeof(struct acpi_handle_list));
status = acpi_evaluate_reference(tz->device->handle,
name, NULL, &devices);
- if (ACPI_FAILURE(status))
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_WARNING PREFIX
+ "Invalid active%d threshold\n", i);
tz->trips.active[i].flags.valid = 0;
+ }
else
tz->trips.active[i].flags.valid = 1;