[PATCH 5.15 526/691] media: sun4i_csi: Implement link validate for sun4i_csi subdev

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5.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>

commit 2dc5d5d401f5c6cecd97800ffef82e8d17d228f0 upstream.

The sun4i_csi driver doesn't implement link validation for the subdev it
registers, leaving the link between the subdev and its source
unvalidated. Fix it, using the v4l2_subdev_link_validate() helper.

Fixes: 577bbf23b758 ("media: sunxi: Add A10 CSI driver")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
Acked-by: Chen-Yu Tsai <wens@xxxxxxxx>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen+renesas@xxxxxxxxxxxxxxxx>
Acked-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/media/platform/sunxi/sun4i-csi/sun4i_csi.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/media/platform/sunxi/sun4i-csi/sun4i_csi.c
+++ b/drivers/media/platform/sunxi/sun4i-csi/sun4i_csi.c
@@ -40,6 +40,10 @@ static const struct media_entity_operati
 	.link_validate = v4l2_subdev_link_validate,
 };
 
+static const struct media_entity_operations sun4i_csi_subdev_entity_ops = {
+	.link_validate = v4l2_subdev_link_validate,
+};
+
 static int sun4i_csi_notify_bound(struct v4l2_async_notifier *notifier,
 				  struct v4l2_subdev *subdev,
 				  struct v4l2_async_subdev *asd)
@@ -218,6 +222,7 @@ static int sun4i_csi_probe(struct platfo
 	v4l2_subdev_init(subdev, &sun4i_csi_subdev_ops);
 	subdev->flags = V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
 	subdev->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
+	subdev->entity.ops = &sun4i_csi_subdev_entity_ops;
 	subdev->owner = THIS_MODULE;
 	snprintf(subdev->name, sizeof(subdev->name), "sun4i-csi-0");
 	v4l2_set_subdevdata(subdev, csi);






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