[media] sn9c102_core: add v4l2_device and replace parent with v4l2_dev

This driver did not yet support struct v4l2_device, so add it. This
make it possible to replace the deprecated parent field with the
v4l2_dev field, allowing the eventual removal of the parent field.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

2 files changed, 15 insertions, 1 deletions

diff --git a/drivers/media/usb/sn9c102/sn9c102.h b/drivers/media/usb/sn9c102/sn9c102.h
index 2bc153e869be..8a917f060503 100644
--- a/drivers/media/usb/sn9c102/sn9c102.h
+++ b/drivers/media/usb/sn9c102/sn9c102.h
@@ -25,6 +25,7 @@
 #include <linux/videodev2.h>
 #include <media/v4l2-common.h>
 #include <media/v4l2-ioctl.h>
+#include <media/v4l2-device.h>
 #include <linux/device.h>
 #include <linux/list.h>
 #include <linux/spinlock.h>
@@ -100,6 +101,8 @@ static DECLARE_RWSEM(sn9c102_dev_lock);
 struct sn9c102_device {
         struct video_device* v4ldev;
 
+        struct v4l2_device v4l2_dev;
+
         enum sn9c102_bridge bridge;
         struct sn9c102_sensor sensor;
 
diff --git a/drivers/media/usb/sn9c102/sn9c102_core.c b/drivers/media/usb/sn9c102/sn9c102_core.c
index c957e9aa6077..2cb44de2b92c 100644
--- a/drivers/media/usb/sn9c102/sn9c102_core.c
+++ b/drivers/media/usb/sn9c102/sn9c102_core.c
@@ -1737,6 +1737,7 @@ static void sn9c102_release_resources(struct kref *kref)
             video_device_node_name(cam->v4ldev));
         video_set_drvdata(cam->v4ldev, NULL);
         video_unregister_device(cam->v4ldev);
+        v4l2_device_unregister(&cam->v4l2_dev);
         usb_put_dev(cam->usbdev);
         kfree(cam->control_buffer);
         kfree(cam);
@@ -3254,6 +3255,13 @@ sn9c102_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
 
         cam->usbdev = udev;
 
+        /* register v4l2_device early so it can be used for printks */
+        if (v4l2_device_register(&intf->dev, &cam->v4l2_dev)) {
+                dev_err(&intf->dev, "v4l2_device_register failed\n");
+                err = -ENOMEM;
+                goto fail;
+        }
+
         if (!(cam->control_buffer = kzalloc(8, GFP_KERNEL))) {
                 DBG(1, "kzalloc() failed");
                 err = -ENOMEM;
@@ -3325,7 +3333,7 @@ sn9c102_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
         strcpy(cam->v4ldev->name, "SN9C1xx PC Camera");
         cam->v4ldev->fops = &sn9c102_fops;
         cam->v4ldev->release = video_device_release;
-        cam->v4ldev->parent = &udev->dev;
+        cam->v4ldev->v4l2_dev = &cam->v4l2_dev;
 
         init_completion(&cam->probe);
 
@@ -3377,6 +3385,7 @@ fail:
                 kfree(cam->control_buffer);
                 if (cam->v4ldev)
                         video_device_release(cam->v4ldev);
+                v4l2_device_unregister(&cam->v4l2_dev);
                 kfree(cam);
         }
         return err;
@@ -3407,6 +3416,8 @@ static void sn9c102_usb_disconnect(struct usb_interface* intf)
 
         wake_up_interruptible_all(&cam->wait_open);
 
+        v4l2_device_disconnect(&cam->v4l2_dev);
+
         kref_put(&cam->kref, sn9c102_release_resources);
 
         up_write(&sn9c102_dev_lock);