Lines Matching refs:udev
42 struct uleds_device *udev = container_of(led_cdev, struct uleds_device,
45 if (udev->brightness != brightness) {
46 udev->brightness = brightness;
47 udev->new_data = true;
48 wake_up_interruptible(&udev->waitq);
54 struct uleds_device *udev;
56 udev = kzalloc(sizeof(*udev), GFP_KERNEL);
57 if (!udev)
60 udev->led_cdev.name = udev->user_dev.name;
61 udev->led_cdev.brightness_set = uleds_brightness_set;
63 mutex_init(&udev->mutex);
64 init_waitqueue_head(&udev->waitq);
65 udev->state = ULEDS_STATE_UNKNOWN;
67 file->private_data = udev;
76 struct uleds_device *udev = file->private_data;
83 ret = mutex_lock_interruptible(&udev->mutex);
87 if (udev->state == ULEDS_STATE_REGISTERED) {
97 if (copy_from_user(&udev->user_dev, buffer,
103 name = udev->user_dev.name;
110 if (udev->user_dev.max_brightness <= 0) {
114 udev->led_cdev.max_brightness = udev->user_dev.max_brightness;
117 &udev->led_cdev);
121 udev->new_data = true;
122 udev->state = ULEDS_STATE_REGISTERED;
126 mutex_unlock(&udev->mutex);
134 struct uleds_device *udev = file->private_data;
137 if (count < sizeof(udev->brightness))
141 retval = mutex_lock_interruptible(&udev->mutex);
145 if (udev->state != ULEDS_STATE_REGISTERED) {
147 } else if (!udev->new_data && (file->f_flags & O_NONBLOCK)) {
149 } else if (udev->new_data) {
150 retval = copy_to_user(buffer, &udev->brightness,
151 sizeof(udev->brightness));
152 udev->new_data = false;
153 retval = sizeof(udev->brightness);
156 mutex_unlock(&udev->mutex);
162 retval = wait_event_interruptible(udev->waitq,
163 udev->new_data ||
164 udev->state != ULEDS_STATE_REGISTERED);
172 struct uleds_device *udev = file->private_data;
174 poll_wait(file, &udev->waitq, wait);
176 if (udev->new_data)
184 struct uleds_device *udev = file->private_data;
186 if (udev->state == ULEDS_STATE_REGISTERED) {
187 udev->state = ULEDS_STATE_UNKNOWN;
189 &udev->led_cdev);
191 kfree(udev);