Document the EIO error since this can happen anywhere anytime and applications
should be aware of this.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
---
diff --git a/Documentation/media/uapi/gen-errors.rst b/Documentation/media/uapi/gen-errors.rst
index 6e983b9..ee224b9 100644
--- a/Documentation/media/uapi/gen-errors.rst
+++ b/Documentation/media/uapi/gen-errors.rst
@@ -94,6 +94,14 @@ Generic Error Codes
- Permission denied. Can be returned if the device needs write
permission, or some special capabilities is needed (e. g. root)
+ - .. row 11
+
+ - ``EIO``
+
+ - I/O error. Typically used when there are problems communicating with
+ a hardware device. This could indicate broken or flaky hardware.
+ It's a 'Something is wrong, I give up!' type of error.
+
.. note::
#. This list is not exaustive; ioctls may return other error codes.
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