diff options
| author | Michael Tretter <m.tretter@pengutronix.de> | 2020-03-16 16:26:29 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-03-20 09:18:33 +0100 |
| commit | 0600130e65f96c9ff72766df73d4b256caa32d04 (patch) | |
| tree | 82e96e6393ca465de718b00896c674823b0055dd /drivers/staging/media/allegro-dvt/allegro-core.c | |
| parent | 857a31f1c1c832e0a173d96af4688cc5212da120 (diff) | |
media: allegro: warn if response message has an unexpected size
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@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/staging/media/allegro-dvt/allegro-core.c')
| -rw-r--r-- | drivers/staging/media/allegro-dvt/allegro-core.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/staging/media/allegro-dvt/allegro-core.c b/drivers/staging/media/allegro-dvt/allegro-core.c index d8f0fe175038..8321b1e2576e 100644 --- a/drivers/staging/media/allegro-dvt/allegro-core.c +++ b/drivers/staging/media/allegro-dvt/allegro-core.c @@ -1711,6 +1711,12 @@ 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, @@ -1804,6 +1810,12 @@ 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, |