Merge tag 'thermal-5.18-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull thermal control fix from Rafael Wysocki:
 "Fix up a recent change in the int340x thermal driver that
  inadvertently broke thermal zone handling on some systems
  (Srinivas Pandruvada)"

* tag 'thermal-5.18-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  thermal: int340x: Mode setting with new OS handshake

1 files changed, 32 insertions, 16 deletions

diff --git a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
index d97f496bab9b..79931ddc582a 100644
--- a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
+++ b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
@@ -194,12 +194,31 @@ static int int3400_thermal_run_osc(acpi_handle handle, char *uuid_str, int *enab
 	return result;
 }
 
+static int set_os_uuid_mask(struct int3400_thermal_priv *priv, u32 mask)
+{
+	int cap = 0;
+
+	/*
+	 * Capability bits:
+	 * Bit 0: set to 1 to indicate DPTF is active
+	 * Bi1 1: set to 1 to active cooling is supported by user space daemon
+	 * Bit 2: set to 1 to passive cooling is supported by user space daemon
+	 * Bit 3: set to 1 to critical trip is handled by user space daemon
+	 */
+	if (mask)
+		cap = (priv->os_uuid_mask << 1) | 0x01;
+
+	return int3400_thermal_run_osc(priv->adev->handle,
+				       "b23ba85d-c8b7-3542-88de-8de2ffcfd698",
+				       &cap);
+}
+
 static ssize_t current_uuid_store(struct device *dev,
 				  struct device_attribute *attr,
 				  const char *buf, size_t count)
 {
 	struct int3400_thermal_priv *priv = dev_get_drvdata(dev);
-	int i;
+	int ret, i;
 
 	for (i = 0; i < INT3400_THERMAL_MAXIMUM_UUID; ++i) {
 		if (!strncmp(buf, int3400_thermal_uuids[i],
@@ -231,19 +250,7 @@ static ssize_t current_uuid_store(struct device *dev,
 	}
 
 	if (priv->os_uuid_mask) {
-		int cap, ret;
-
-		/*
-		 * Capability bits:
-		 * Bit 0: set to 1 to indicate DPTF is active
-		 * Bi1 1: set to 1 to active cooling is supported by user space daemon
-		 * Bit 2: set to 1 to passive cooling is supported by user space daemon
-		 * Bit 3: set to 1 to critical trip is handled by user space daemon
-		 */
-		cap = ((priv->os_uuid_mask << 1) | 0x01);
-		ret = int3400_thermal_run_osc(priv->adev->handle,
-					      "b23ba85d-c8b7-3542-88de-8de2ffcfd698",
-					      &cap);
+		ret = set_os_uuid_mask(priv, priv->os_uuid_mask);
 		if (ret)
 			return ret;
 	}
@@ -469,17 +476,26 @@ static int int3400_thermal_change_mode(struct thermal_zone_device *thermal,
 	if (mode != thermal->mode) {
 		int enabled;
 
+		enabled = mode == THERMAL_DEVICE_ENABLED;
+
+		if (priv->os_uuid_mask) {
+			if (!enabled) {
+				priv->os_uuid_mask = 0;
+				result = set_os_uuid_mask(priv, priv->os_uuid_mask);
+			}
+			goto eval_odvp;
+		}
+
 		if (priv->current_uuid_index < 0 ||
 		    priv->current_uuid_index >= INT3400_THERMAL_MAXIMUM_UUID)
 			return -EINVAL;
 
-		enabled = (mode == THERMAL_DEVICE_ENABLED);
 		result = int3400_thermal_run_osc(priv->adev->handle,
 						 int3400_thermal_uuids[priv->current_uuid_index],
 						 &enabled);
 	}
 
-
+eval_odvp:
 	evaluate_odvp(priv);
 
 	return result;