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-rw-r--r--Documentation/userspace-api/media/v4l/metafmt-uvc.rst4
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/userspace-api/media/v4l/metafmt-uvc.rst b/Documentation/userspace-api/media/v4l/metafmt-uvc.rst
index 784346d14bbd..4c05e9e54683 100644
--- a/Documentation/userspace-api/media/v4l/metafmt-uvc.rst
+++ b/Documentation/userspace-api/media/v4l/metafmt-uvc.rst
@@ -44,7 +44,9 @@ Each individual block contains the following fields:
them
* - :cspan:`1` *The rest is an exact copy of the UVC payload header:*
* - __u8 length;
- - length of the rest of the block, including this field
+ - length of the rest of the block, including this field. Please note that
+ regardless of this value, for V4L2_META_FMT_UVC the kernel will never
+ copy more than 2-12 bytes.
* - __u8 flags;
- Flags, indicating presence of other standard UVC fields
* - __u8 buf[];