[media] s5p-fimc: Prevent race conditions during subdevs registration
Make sure when fimc and fimc-lite capture video node is registered
it has valid pipeline_ops assigned to it. Otherwise when a video
node is opened right after is was registered there, might be an
attempt to use ops that are just being assigned, after function
v4l2_device_register_subdev() returns.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/platform/s5p-fimc/fimc-lite.c b/drivers/media/platform/s5p-fimc/fimc-lite.c
index 9db246b..23f203e 100644
--- a/drivers/media/platform/s5p-fimc/fimc-lite.c
+++ b/drivers/media/platform/s5p-fimc/fimc-lite.c
@@ -1263,10 +1263,12 @@
return ret;
video_set_drvdata(vfd, fimc);
+ fimc->pipeline_ops = v4l2_get_subdev_hostdata(sd);
ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
if (ret < 0) {
media_entity_cleanup(&vfd->entity);
+ fimc->pipeline_ops = NULL;
return ret;
}
@@ -1285,6 +1287,7 @@
if (video_is_registered(&fimc->vfd)) {
video_unregister_device(&fimc->vfd);
media_entity_cleanup(&fimc->vfd.entity);
+ fimc->pipeline_ops = NULL;
}
}