From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Embed the video_device struct to simplify the error handling and in
order to (eventually) get rid of video_device_alloc/release.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
---
drivers/usb/gadget/function/f_uvc.c | 44 +++++++++++++++----------------------
drivers/usb/gadget/function/uvc.h | 2 +-
2 files changed, 19 insertions(+), 27 deletions(-)
diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c
index 3242bc6..cf0df8f 100644
--- a/drivers/usb/gadget/function/f_uvc.c
+++ b/drivers/usb/gadget/function/f_uvc.c
@@ -222,7 +222,7 @@ uvc_function_ep0_complete(struct usb_ep *ep, struct usb_request *req)
v4l2_event.type = UVC_EVENT_DATA;
uvc_event->data.length = req->actual;
memcpy(&uvc_event->data.data, req->buf, req->actual);
- v4l2_event_queue(uvc->vdev, &v4l2_event);
+ v4l2_event_queue(&uvc->vdev, &v4l2_event);
}
}
@@ -256,7 +256,7 @@ uvc_function_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
memset(&v4l2_event, 0, sizeof(v4l2_event));
v4l2_event.type = UVC_EVENT_SETUP;
memcpy(&uvc_event->req, ctrl, sizeof(uvc_event->req));
- v4l2_event_queue(uvc->vdev, &v4l2_event);
+ v4l2_event_queue(&uvc->vdev, &v4l2_event);
return 0;
}
@@ -315,7 +315,7 @@ uvc_function_set_alt(struct usb_function *f, unsigned interface, unsigned alt)
memset(&v4l2_event, 0, sizeof(v4l2_event));
v4l2_event.type = UVC_EVENT_CONNECT;
uvc_event->speed = cdev->gadget->speed;
- v4l2_event_queue(uvc->vdev, &v4l2_event);
+ v4l2_event_queue(&uvc->vdev, &v4l2_event);
uvc->state = UVC_STATE_CONNECTED;
}
@@ -343,7 +343,7 @@ uvc_function_set_alt(struct usb_function *f, unsigned interface, unsigned alt)
memset(&v4l2_event, 0, sizeof(v4l2_event));
v4l2_event.type = UVC_EVENT_STREAMOFF;
- v4l2_event_queue(uvc->vdev, &v4l2_event);
+ v4l2_event_queue(&uvc->vdev, &v4l2_event);
uvc->state = UVC_STATE_CONNECTED;
return 0;
@@ -370,7 +370,7 @@ uvc_function_set_alt(struct usb_function *f, unsigned interface, unsigned alt)
memset(&v4l2_event, 0, sizeof(v4l2_event));
v4l2_event.type = UVC_EVENT_STREAMON;
- v4l2_event_queue(uvc->vdev, &v4l2_event);
+ v4l2_event_queue(&uvc->vdev, &v4l2_event);
return USB_GADGET_DELAYED_STATUS;
default:
@@ -388,7 +388,7 @@ uvc_function_disable(struct usb_function *f)
memset(&v4l2_event, 0, sizeof(v4l2_event));
v4l2_event.type = UVC_EVENT_DISCONNECT;
- v4l2_event_queue(uvc->vdev, &v4l2_event);
+ v4l2_event_queue(&uvc->vdev, &v4l2_event);
uvc->state = UVC_STATE_DISCONNECTED;
@@ -435,25 +435,19 @@ static int
uvc_register_video(struct uvc_device *uvc)
{
struct usb_composite_dev *cdev = uvc->func.config->cdev;
- struct video_device *video;
/* TODO reference counting. */
- video = video_device_alloc();
- if (video == NULL)
- return -ENOMEM;
-
- video->v4l2_dev = &uvc->v4l2_dev;
- video->fops = &uvc_v4l2_fops;
- video->ioctl_ops = &uvc_v4l2_ioctl_ops;
- video->release = video_device_release;
- video->vfl_dir = VFL_DIR_TX;
- video->lock = &uvc->video.mutex;
- strlcpy(video->name, cdev->gadget->name, sizeof(video->name));
-
- uvc->vdev = video;
- video_set_drvdata(video, uvc);
-
- return video_register_device(video, VFL_TYPE_GRABBER, -1);
+ uvc->vdev.v4l2_dev = &uvc->v4l2_dev;
+ uvc->vdev.fops = &uvc_v4l2_fops;
+ uvc->vdev.ioctl_ops = &uvc_v4l2_ioctl_ops;
+ uvc->vdev.release = video_device_release_empty;
+ uvc->vdev.vfl_dir = VFL_DIR_TX;
+ uvc->vdev.lock = &uvc->video.mutex;
+ strlcpy(uvc->vdev.name, cdev->gadget->name, sizeof(uvc->vdev.name));
+
+ video_set_drvdata(&uvc->vdev, uvc);
+
+ return video_register_device(&uvc->vdev, VFL_TYPE_GRABBER, -1);
}
#define UVC_COPY_DESCRIPTOR(mem, dst, desc) \
@@ -766,8 +760,6 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
error:
v4l2_device_unregister(&uvc->v4l2_dev);
- if (uvc->vdev)
- video_device_release(uvc->vdev);
if (uvc->control_ep)
uvc->control_ep->driver_data = NULL;
@@ -898,7 +890,7 @@ static void uvc_unbind(struct usb_configuration *c, struct usb_function *f)
INFO(cdev, "%s\n", __func__);
- video_unregister_device(uvc->vdev);
+ video_unregister_device(&uvc->vdev);
v4l2_device_unregister(&uvc->v4l2_dev);
uvc->control_ep->driver_data = NULL;
uvc->video.ep->driver_data = NULL;
diff --git a/drivers/usb/gadget/function/uvc.h b/drivers/usb/gadget/function/uvc.h
index 3390ecd..ebe409b 100644
--- a/drivers/usb/gadget/function/uvc.h
+++ b/drivers/usb/gadget/function/uvc.h
@@ -144,7 +144,7 @@ enum uvc_state
struct uvc_device
{
- struct video_device *vdev;
+ struct video_device vdev;
struct v4l2_device v4l2_dev;
enum uvc_state state;
struct usb_function func;
--
2.1.4
--
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