[PATCH v8 03/28] rcar-vin: unregister video device on driver removal

["Niklas Söderlund" <niklas.soderlund+renesas@ragnatech.se>]

If the video device was registered by the complete() callback it should
be unregistered when the driver is removed. Protect from printing a
uninitialized video device node name by adding a checking in
rvin_v4l2_unregister() by checking that the video device is registered.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
---
 drivers/media/platform/rcar-vin/rcar-core.c | 2 ++
 drivers/media/platform/rcar-vin/rcar-v4l2.c | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/drivers/media/platform/rcar-vin/rcar-core.c b/drivers/media/platform/rcar-vin/rcar-core.c
index f7a4c21909da6923..6d99542ec74b49a7 100644
--- a/drivers/media/platform/rcar-vin/rcar-core.c
+++ b/drivers/media/platform/rcar-vin/rcar-core.c
@@ -272,6 +272,8 @@ static int rcar_vin_remove(struct platform_device *pdev)
 
 	pm_runtime_disable(&pdev->dev);
 
+	rvin_v4l2_unregister(vin);
+
 	v4l2_async_notifier_unregister(&vin->notifier);
 	v4l2_async_notifier_cleanup(&vin->notifier);
 
diff --git a/drivers/media/platform/rcar-vin/rcar-v4l2.c b/drivers/media/platform/rcar-vin/rcar-v4l2.c
index 178aecc94962abe2..32a658214f48fa49 100644
--- a/drivers/media/platform/rcar-vin/rcar-v4l2.c
+++ b/drivers/media/platform/rcar-vin/rcar-v4l2.c
@@ -841,6 +841,9 @@ static const struct v4l2_file_operations rvin_fops = {
 
 void rvin_v4l2_unregister(struct rvin_dev *vin)
 {
+	if (!video_is_registered(&vin->vdev))
+		return;
+
 	v4l2_info(&vin->v4l2_dev, "Removing %s\n",
 		  video_device_node_name(&vin->vdev));
 
-- 
2.15.0