Pull events into release branch

[linux-block.git] / drivers / acpi / thermal.c

diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 2c9cfe297f73f0c403cc58c0acc57e12913d0e2c..bc6d5866ef9867452c2e2881d5e09df16824f094 100644 (file)
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -77,23 +77,27 @@ MODULE_LICENSE("GPL");
 
 static int act;
 module_param(act, int, 0644);
-MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.\n");
+MODULE_PARM_DESC(act, "Disable or override all lowest active trip points.");
+
+static int crt;
+module_param(crt, int, 0644);
+MODULE_PARM_DESC(crt, "Disable or lower all critical trip points.");
 
 static int tzp;
 module_param(tzp, int, 0444);
-MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.\n");
+MODULE_PARM_DESC(tzp, "Thermal zone polling frequency, in 1/10 seconds.");
 
 static int nocrt;
 module_param(nocrt, int, 0);
-MODULE_PARM_DESC(nocrt, "Set to disable action on ACPI thermal zone critical and hot trips.\n");
+MODULE_PARM_DESC(nocrt, "Set to take no action upon ACPI thermal zone critical trips points.");
 
 static int off;
 module_param(off, int, 0);
-MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.\n");
+MODULE_PARM_DESC(off, "Set to disable ACPI thermal support.");
 
 static int psv;
 module_param(psv, int, 0644);
-MODULE_PARM_DESC(psv, "Disable or override all passive trip points.\n");
+MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
 
 static int acpi_thermal_add(struct acpi_device *device);
 static int acpi_thermal_remove(struct acpi_device *device, int type);
@@ -340,6 +344,20 @@ static int acpi_thermal_get_trip_points(struct acpi_thermal *tz)
                                  tz->trips.critical.temperature));
        }
 
+       if (tz->trips.critical.flags.valid == 1) {
+               if (crt == -1) {
+                       tz->trips.critical.flags.valid = 0;
+               } else if (crt > 0) {
+                       unsigned long crt_k = CELSIUS_TO_KELVIN(crt);
+
+                       /*
+                        * Allow override to lower critical threshold
+                        */
+                       if (crt_k < tz->trips.critical.temperature)
+                               tz->trips.critical.temperature = crt_k;
+               }
+       }
+
        /* Critical Sleep (optional) */
 
        status =
@@ -1075,9 +1093,9 @@ static int acpi_thermal_add_fs(struct acpi_device *device)
                entry->owner = THIS_MODULE;
        }
 
-       /* 'trip_points' [R/W] */
+       /* 'trip_points' [R] */
        entry = create_proc_entry(ACPI_THERMAL_FILE_TRIP_POINTS,
-                                 S_IFREG | S_IRUGO | S_IWUSR,
+                                 S_IRUGO,
                                  acpi_device_dir(device));
        if (!entry)
                return -ENODEV;
@@ -1351,6 +1369,13 @@ static int thermal_act(struct dmi_system_id *d) {
        }
        return 0;
 }
+static int thermal_nocrt(struct dmi_system_id *d) {
+
+       printk(KERN_NOTICE "ACPI: %s detected: "
+               "disabling all critical thermal trip point actions.\n", d->ident);
+       nocrt = 1;
+       return 0;
+}
 static int thermal_tzp(struct dmi_system_id *d) {
 
        if (tzp == 0) {
@@ -1399,6 +1424,14 @@ static struct dmi_system_id thermal_dmi_table[] __initdata = {
                DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
                },
        },
+       {
+        .callback = thermal_nocrt,
+        .ident = "Gigabyte GA-7ZX",
+        .matches = {
+               DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
+               DMI_MATCH(DMI_BOARD_NAME, "7ZX"),
+               },
+       },
        {}
 };
 #endif /* CONFIG_DMI */