media: rkisp1: stats: Simplify (un)registration

Simplify error handling at registration time as media_entity_cleanup()
can be called on an uninitialized entity, and make
rkisp1_stats_unregister() safe to be called on an unregistered stats
node to prepare for simplification of error handling at probe time.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-stats.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-stats.c
index be5777c..26ef3bb 100644 (file)
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-stats.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-stats.c
@@ -463,21 +463,21 @@ int rkisp1_stats_register(struct rkisp1_device *rkisp1)
        node->pad.flags = MEDIA_PAD_FL_SINK;
        ret = media_entity_pads_init(&vdev->entity, 1, &node->pad);
        if (ret)
-               goto err_mutex_destroy;
+               goto error;
 
        ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
        if (ret) {
                dev_err(&vdev->dev,
                        "failed to register %s, ret=%d\n", vdev->name, ret);
-               goto err_cleanup_media_entity;
+               goto error;
        }
 
        return 0;
 
-err_cleanup_media_entity:
+error:
        media_entity_cleanup(&vdev->entity);
-err_mutex_destroy:
        mutex_destroy(&node->vlock);
+       stats->rkisp1 = NULL;
        return ret;
 }
 
@@ -487,6 +487,9 @@ void rkisp1_stats_unregister(struct rkisp1_device *rkisp1)
        struct rkisp1_vdev_node *node = &stats->vnode;
        struct video_device *vdev = &node->vdev;
 
+       if (!stats->rkisp1)
+               return;
+
        vb2_video_unregister_device(vdev);
        media_entity_cleanup(&vdev->entity);
        mutex_destroy(&node->vlock);