Merge branches 'acpi-button', 'acpi-video' and 'acpi-fan'

Merge ACPI button, ACPI backlight (video), and ACPI fan driver fixes for
6.18-rc4:

 - Call input_free_device() on failing input device registration as
   necessary (and mentioned in the input subsystem documentation) in the
   ACPI button driver (Kaushlendra Kumar)

 - Fix use-after-free in acpi_video_switch_brightness() by canceling
   a delayed work during tear-down (Yuhao Jiang)

 - Use platform device for devres-related actions in the ACPI fan driver
   to allow device-managed resources to be cleaned up properly (Armin
   Wolf)

* acpi-button:
  ACPI: button: Call input_free_device() on failing input device registration

* acpi-video:
  ACPI: video: Fix use-after-free in acpi_video_switch_brightness()

* acpi-fan:
  ACPI: fan: Use platform device for devres-related actions
  ACPI: fan: Use ACPI handle when retrieving _FST

Author: rafaeljw

drivers/acpi/acpi_video.c

@@ -1959,8 +1959,10 @@ static void acpi_video_bus_remove_notify_handler(struct acpi_video_bus *video)
 	struct acpi_video_device *dev;
 
 	mutex_lock(&video->device_list_lock);
-	list_for_each_entry(dev, &video->video_device_list, entry)
+	list_for_each_entry(dev, &video->video_device_list, entry) {
 		acpi_video_dev_remove_notify_handler(dev);
+		cancel_delayed_work_sync(&dev->switch_brightness_work);
+	}
 	mutex_unlock(&video->device_list_lock);
 
 	acpi_video_bus_stop_devices(video);

drivers/acpi/button.c

@@ -619,8 +619,10 @@ static int acpi_button_add(struct acpi_device *device)
 
 	input_set_drvdata(input, device);
 	error = input_register_device(input);
-	if (error)
+	if (error) {
+		input_free_device(input);
 		goto err_remove_fs;
+	}
 
 	switch (device->device_type) {
 	case ACPI_BUS_TYPE_POWER_BUTTON:

drivers/acpi/fan.h

@@ -49,6 +49,7 @@ struct acpi_fan_fst {
 };
 
 struct acpi_fan {
+	acpi_handle handle;
 	bool acpi4;
 	bool has_fst;
 	struct acpi_fan_fif fif;
@@ -59,14 +60,14 @@ struct acpi_fan {
 	struct device_attribute fine_grain_control;
 };
 
-int acpi_fan_get_fst(struct acpi_device *device, struct acpi_fan_fst *fst);
+int acpi_fan_get_fst(acpi_handle handle, struct acpi_fan_fst *fst);
 int acpi_fan_create_attributes(struct acpi_device *device);
 void acpi_fan_delete_attributes(struct acpi_device *device);
 
 #if IS_REACHABLE(CONFIG_HWMON)
-int devm_acpi_fan_create_hwmon(struct acpi_device *device);
+int devm_acpi_fan_create_hwmon(struct device *dev);
 #else
-static inline int devm_acpi_fan_create_hwmon(struct acpi_device *device) { return 0; };
+static inline int devm_acpi_fan_create_hwmon(struct device *dev) { return 0; };
 #endif
 
 #endif

drivers/acpi/fan_attr.c

@@ -55,7 +55,7 @@ static ssize_t show_fan_speed(struct device *dev, struct device_attribute *attr,
 	struct acpi_fan_fst fst;
 	int status;
 
-	status = acpi_fan_get_fst(acpi_dev, &fst);
+	status = acpi_fan_get_fst(acpi_dev->handle, &fst);
 	if (status)
 		return status;
 

drivers/acpi/fan_core.c

@@ -44,25 +44,30 @@ static int fan_get_max_state(struct thermal_cooling_device *cdev, unsigned long
 	return 0;
 }
 
-int acpi_fan_get_fst(struct acpi_device *device, struct acpi_fan_fst *fst)
+int acpi_fan_get_fst(acpi_handle handle, struct acpi_fan_fst *fst)
 {
 	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 	union acpi_object *obj;
 	acpi_status status;
 	int ret = 0;
 
-	status = acpi_evaluate_object(device->handle, "_FST", NULL, &buffer);
-	if (ACPI_FAILURE(status)) {
-		dev_err(&device->dev, "Get fan state failed\n");
-		return -ENODEV;
-	}
+	status = acpi_evaluate_object(handle, "_FST", NULL, &buffer);
+	if (ACPI_FAILURE(status))
+		return -EIO;
 
 	obj = buffer.pointer;
-	if (!obj || obj->type != ACPI_TYPE_PACKAGE ||
-	    obj->package.count != 3 ||
-	    obj->package.elements[1].type != ACPI_TYPE_INTEGER) {
-		dev_err(&device->dev, "Invalid _FST data\n");
-		ret = -EINVAL;
+	if (!obj)
+		return -ENODATA;
+
+	if (obj->type != ACPI_TYPE_PACKAGE || obj->package.count != 3) {
+		ret = -EPROTO;
+		goto err;
+	}
+
+	if (obj->package.elements[0].type != ACPI_TYPE_INTEGER ||
+	    obj->package.elements[1].type != ACPI_TYPE_INTEGER ||
+	    obj->package.elements[2].type != ACPI_TYPE_INTEGER) {
+		ret = -EPROTO;
 		goto err;
 	}
 
@@ -81,7 +86,7 @@ static int fan_get_state_acpi4(struct acpi_device *device, unsigned long *state)
 	struct acpi_fan_fst fst;
 	int status, i;
 
-	status = acpi_fan_get_fst(device, &fst);
+	status = acpi_fan_get_fst(device->handle, &fst);
 	if (status)
 		return status;
 
@@ -311,11 +316,16 @@ static int acpi_fan_probe(struct platform_device *pdev)
 	struct acpi_device *device = ACPI_COMPANION(&pdev->dev);
 	char *name;
 
+	if (!device)
+		return -ENODEV;
+
 	fan = devm_kzalloc(&pdev->dev, sizeof(*fan), GFP_KERNEL);
 	if (!fan) {
 		dev_err(&device->dev, "No memory for fan\n");
 		return -ENOMEM;
 	}
+
+	fan->handle = device->handle;
 	device->driver_data = fan;
 	platform_set_drvdata(pdev, fan);
 
@@ -337,7 +347,7 @@ static int acpi_fan_probe(struct platform_device *pdev)
 	}
 
 	if (fan->has_fst) {
-		result = devm_acpi_fan_create_hwmon(device);
+		result = devm_acpi_fan_create_hwmon(&pdev->dev);
 		if (result)
 			return result;
 

drivers/acpi/fan_hwmon.c

@@ -93,13 +93,12 @@ static umode_t acpi_fan_hwmon_is_visible(const void *drvdata, enum hwmon_sensor_
 static int acpi_fan_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
 			       int channel, long *val)
 {
-	struct acpi_device *adev = to_acpi_device(dev->parent);
 	struct acpi_fan *fan = dev_get_drvdata(dev);
 	struct acpi_fan_fps *fps;
 	struct acpi_fan_fst fst;
 	int ret;
 
-	ret = acpi_fan_get_fst(adev, &fst);
+	ret = acpi_fan_get_fst(fan->handle, &fst);
 	if (ret < 0)
 		return ret;
 
@@ -167,12 +166,12 @@ static const struct hwmon_chip_info acpi_fan_hwmon_chip_info = {
 	.info = acpi_fan_hwmon_info,
 };
 
-int devm_acpi_fan_create_hwmon(struct acpi_device *device)
+int devm_acpi_fan_create_hwmon(struct device *dev)
 {
-	struct acpi_fan *fan = acpi_driver_data(device);
+	struct acpi_fan *fan = dev_get_drvdata(dev);
 	struct device *hdev;
 
-	hdev = devm_hwmon_device_register_with_info(&device->dev, "acpi_fan", fan,
-						    &acpi_fan_hwmon_chip_info, NULL);
+	hdev = devm_hwmon_device_register_with_info(dev, "acpi_fan", fan, &acpi_fan_hwmon_chip_info,
+						    NULL);
 	return PTR_ERR_OR_ZERO(hdev);
 }