The driver uses structs to parse the responses from the VCU and expects
a certain size of the responses. However, the size and format of the
mails is not stable across firmware versions. Therefore, print a warning
if the size does not match the expected size to warn the user that
strange things might happen.
Signed-off-by: Michael Tretter <m.tretter@xxxxxxxxxxxxxx>
---
drivers/staging/media/allegro-dvt/allegro-core.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/staging/media/allegro-dvt/allegro-core.c b/drivers/staging/media/allegro-dvt/allegro-core.c
index c0b3a6858b27..868dd9b35400 100644
--- a/drivers/staging/media/allegro-dvt/allegro-core.c
+++ b/drivers/staging/media/allegro-dvt/allegro-core.c
@@ -1696,6 +1696,11 @@ allegro_handle_create_channel(struct allegro_dev *dev,
struct allegro_channel *channel;
int err = 0;
+ if (msg->header.length != sizeof(*msg) - sizeof(msg->header))
+ v4l2_warn(&dev->v4l2_dev,
+ "received message has %d bytes, but expected %zu\n",
+ msg->header.length, sizeof(*msg) - sizeof(msg->header));
+
channel = allegro_find_channel_by_user_id(dev, msg->user_id);
if (IS_ERR(channel)) {
v4l2_warn(&dev->v4l2_dev,
@@ -1789,6 +1794,11 @@ allegro_handle_encode_frame(struct allegro_dev *dev,
{
struct allegro_channel *channel;
+ if (msg->header.length != sizeof(*msg) - sizeof(msg->header))
+ v4l2_warn(&dev->v4l2_dev,
+ "received message has %d bytes, but expected %zu\n",
+ msg->header.length, sizeof(*msg) - sizeof(msg->header));
+
channel = allegro_find_channel_by_channel_id(dev, msg->channel_id);
if (IS_ERR(channel)) {
v4l2_err(&dev->v4l2_dev,
--
2.20.1
