From: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Date: Thu, 6 Jun 2019 10:00:30 +0000 (-0400)
Subject: media: vicodec: stateless codecs do not have EOS and SOURCE_CHANGE events
X-Git-Tag: v5.3-rc1~170^2~172
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=3b6813d6f52d18674e5bbfcf7ff4bcec15569144;p=linux.git

media: vicodec: stateless codecs do not have EOS and SOURCE_CHANGE events

Return an error when attempting to subscribe to those events
for a stateless codec.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
---

diff --git a/drivers/media/platform/vicodec/vicodec-core.c b/drivers/media/platform/vicodec/vicodec-core.c
index ce7f7bf1b998..91cd0c1dbede 100644
--- a/drivers/media/platform/vicodec/vicodec-core.c
+++ b/drivers/media/platform/vicodec/vicodec-core.c
@@ -1293,6 +1293,8 @@ static int vicodec_subscribe_event(struct v4l2_fh *fh,
 			return -EINVAL;
 		/* fall through */
 	case V4L2_EVENT_EOS:
+		if (ctx->is_stateless)
+			return -EINVAL;
 		return v4l2_event_subscribe(fh, sub, 0, NULL);
 	default:
 		return v4l2_ctrl_subscribe_event(fh, sub);