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-rw-r--r--Documentation/DocBook/media/v4l/gen-errors.xml10
1 files changed, 9 insertions, 1 deletions
diff --git a/Documentation/DocBook/media/v4l/gen-errors.xml b/Documentation/DocBook/media/v4l/gen-errors.xml
index 9bf9ca7f46d..4268c658652 100644
--- a/Documentation/DocBook/media/v4l/gen-errors.xml
+++ b/Documentation/DocBook/media/v4l/gen-errors.xml
@@ -31,7 +31,8 @@
<row>
<entry>EINVAL or ENOTTY</entry>
<entry>The ioctl is not supported by the driver, actually meaning that
- the required functionality is not available.</entry>
+ the required functionality is not available, or the file
+ descriptor is not for a media device.</entry>
</row>
<row>
<entry>ENOMEM</entry>
@@ -46,3 +47,10 @@
</tbody>
</tgroup>
</table>
+
+<para>Note 1: ioctls may return other error codes. Since errors may have side
+effects such as a driver reset, applications should abort on unexpected errors.
+</para>
+
+<para>Note 2: Request-specific error codes are listed in the individual
+requests descriptions.</para>