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thermal: Make sysfs attributes of cooling devices default attributes 

Default attributes are created when the device is registered. Attributes
created after device registration can lead to race conditions, where user space
(e.g. udev) sees the device but not the attributes.

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
This commit is contained in:
Matthias Kaehlcke 2015-02-20 18:10:08 -08:00 committed by Eduardo Valentin
parent d5bce86777
commit 2dc10f8963
1 changed files with 17 additions and 20 deletions
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37
drivers/thermal/thermal_core.c
View File

@ -899,6 +899,22 @@ thermal_cooling_device_trip_point_show(struct device *dev,
return sprintf(buf, "%d\n", instance->trip);
}
static struct attribute *cooling_device_attrs[] = {
&dev_attr_cdev_type.attr,
&dev_attr_max_state.attr,
&dev_attr_cur_state.attr,
NULL,
};
static const struct attribute_group cooling_device_attr_group = {
.attrs = cooling_device_attrs,
};
static const struct attribute_group *cooling_device_attr_groups[] = {
&cooling_device_attr_group,
NULL,
};
/* Device management */
/**
@ -1130,6 +1146,7 @@ __thermal_cooling_device_register(struct device_node *np,
cdev->ops = ops;
cdev->updated = false;
cdev->device.class = &thermal_class;
cdev->device.groups = cooling_device_attr_groups;
cdev->devdata = devdata;
dev_set_name(&cdev->device, "cooling_device%d", cdev->id);
result = device_register(&cdev->device);
@ -1139,21 +1156,6 @@ __thermal_cooling_device_register(struct device_node *np,
return ERR_PTR(result);
}
/* sys I/F */
if (type) {
result = device_create_file(&cdev->device, &dev_attr_cdev_type);
if (result)
goto unregister;
}
result = device_create_file(&cdev->device, &dev_attr_max_state);
if (result)
goto unregister;
result = device_create_file(&cdev->device, &dev_attr_cur_state);
if (result)
goto unregister;
/* Add 'this' new cdev to the global cdev list */
mutex_lock(&thermal_list_lock);
list_add(&cdev->node, &thermal_cdev_list);
@ -1163,11 +1165,6 @@ __thermal_cooling_device_register(struct device_node *np,
bind_cdev(cdev);
return cdev;
unregister:
release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
device_unregister(&cdev->device);
return ERR_PTR(result);
}
/**