[PATCH v2 01/10] media: v4l2-ctrl: v4l2_ctrl_request_setup returns with error upon failure

[Dafna Hirschfeld <dafna3@gmail.com>]

If one of the controls fails to set,
then 'v4l2_ctrl_request_setup'
immediately returns with the error code.

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
---
 drivers/media/v4l2-core/v4l2-ctrls.c | 18 +++++++++++-------
 include/media/v4l2-ctrls.h           |  2 +-
 2 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index 7825c8d66498..ff75f84011f8 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -3904,18 +3904,19 @@ void v4l2_ctrl_request_complete(struct media_request *req,
 }
 EXPORT_SYMBOL(v4l2_ctrl_request_complete);
 
-void v4l2_ctrl_request_setup(struct media_request *req,
+int v4l2_ctrl_request_setup(struct media_request *req,
 			     struct v4l2_ctrl_handler *main_hdl)
 {
 	struct media_request_object *obj;
 	struct v4l2_ctrl_handler *hdl;
 	struct v4l2_ctrl_ref *ref;
+	int ret = 0;
 
 	if (!req || !main_hdl)
-		return;
+		return 0;
 
 	if (WARN_ON(req->state != MEDIA_REQUEST_STATE_QUEUED))
-		return;
+		return -EBUSY;
 
 	/*
 	 * Note that it is valid if nothing was found. It means
@@ -3924,10 +3925,10 @@ void v4l2_ctrl_request_setup(struct media_request *req,
 	 */
 	obj = media_request_object_find(req, &req_ops, main_hdl);
 	if (!obj)
-		return;
+		return 0;
 	if (obj->completed) {
 		media_request_object_put(obj);
-		return;
+		return -EBUSY;
 	}
 	hdl = container_of(obj, struct v4l2_ctrl_handler, req_obj);
 
@@ -3995,12 +3996,15 @@ void v4l2_ctrl_request_setup(struct media_request *req,
 				update_from_auto_cluster(master);
 		}
 
-		try_or_set_cluster(NULL, master, true, 0);
-
+		ret = try_or_set_cluster(NULL, master, true, 0);
 		v4l2_ctrl_unlock(master);
+
+		if (ret)
+			break;
 	}
 
 	media_request_object_put(obj);
+	return ret;
 }
 EXPORT_SYMBOL(v4l2_ctrl_request_setup);
 
diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
index d63cf227b0ab..c40dcf79b5b9 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -1127,7 +1127,7 @@ __poll_t v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait);
  * applying control values in a request is only applicable to memory-to-memory
  * devices.
  */
-void v4l2_ctrl_request_setup(struct media_request *req,
+int v4l2_ctrl_request_setup(struct media_request *req,
 			     struct v4l2_ctrl_handler *parent);
 
 /**
-- 
2.17.1