usb/uvc/uvc_driver.c

165 	struct uvc_streaming *stream;
167 	list_for_each_entry(stream, &dev->streams, list) {
168 		if (stream->header.bTerminalLink == id)
169 			return stream;
179 static void uvc_stream_delete(struct uvc_streaming *stream)
181 	if (stream->async_wq)
182 		destroy_workqueue(stream->async_wq);
184 	mutex_destroy(&stream->mutex);
186 	usb_put_intf(stream->intf);
188 	kfree(stream->formats);
189 	kfree(stream->header.bmaControls);
190 	kfree(stream);
196 	struct uvc_streaming *stream;
198 	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
199 	if (stream == NULL)
202 	mutex_init(&stream->mutex);
204 	stream->dev = dev;
205 	stream->intf = usb_get_intf(intf);
206 	stream->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
208 	/* Allocate a stream specific work queue for asynchronous tasks. */
209 	stream->async_wq = alloc_workqueue("uvcvideo", WQ_UNBOUND | WQ_HIGHPRI,
211 	if (!stream->async_wq) {
212 		uvc_stream_delete(stream);
216 	return stream;
1898 	struct uvc_streaming *stream = video_get_drvdata(vdev);
1899 	struct uvc_device *dev = stream->dev;
1909 	struct uvc_streaming *stream;
1911 	list_for_each_entry(stream, &dev->streams, list) {
1912 		if (!video_is_registered(&stream->vdev))
1915 		video_unregister_device(&stream->vdev);
1916 		video_unregister_device(&stream->meta.vdev);
1918 		uvc_debugfs_cleanup_stream(stream);
1932 			      struct uvc_streaming *stream,
1957 	vdev->prio = &stream->chain->prio;
1982 	video_set_drvdata(vdev, stream);
1986 		dev_err(&stream->intf->dev,
1997 		struct uvc_streaming *stream)
2002 	ret = uvc_video_init(stream);
2004 		dev_err(&stream->intf->dev,
2009 	if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
2010 		stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE
2013 		stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT;
2015 	uvc_debugfs_init_stream(stream);
2018 	return uvc_register_video_device(dev, stream, &stream->vdev,
2019 					 &stream->queue, stream->type,
2029 	struct uvc_streaming *stream;
2037 		stream = uvc_stream_by_id(dev, term->id);
2038 		if (stream == NULL) {
2045 		stream->chain = chain;
2046 		ret = uvc_register_video(dev, stream);
2054 		uvc_meta_register(stream);
2056 		term->vdev = &stream->vdev;
2273 	struct uvc_streaming *stream;
2288 	list_for_each_entry(stream, &dev->streams, list) {
2289 		if (stream->intf == intf)
2290 			return uvc_video_suspend(stream);
2301 	struct uvc_streaming *stream;
2323 	list_for_each_entry(stream, &dev->streams, list) {
2324 		if (stream->intf == intf) {
2325 			ret = uvc_video_resume(stream, reset);
2327 				uvc_queue_streamoff(&stream->queue,
2328 						    stream->queue.queue.type);