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media: Documentation: Document new v4l2_ctrl_handler_free() behaviour

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v4l2_ctrl_handler_free() no longer resets the handler's error code.
Document it.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
This commit is contained in:
Sakari Ailus
2025-06-19 12:23:48 +03:00
committed by Hans Verkuil
parent 04f541cef2
commit bd227d0fc2
1 changed files with 3 additions and 6 deletions
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9
Documentation/driver-api/media/v4l2-controls.rst
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@@ -110,6 +110,7 @@ For sub-device drivers:
v4l2_ctrl_handler_free(&foo->ctrl_handler);
:c:func:`v4l2_ctrl_handler_free` does not touch the handler's ``error`` field.
2) Add controls:
@@ -191,12 +192,8 @@ These functions are typically called right after the
V4L2_CID_TEST_PATTERN, ARRAY_SIZE(test_pattern) - 1, 0,
0, test_pattern);
...
if (foo->ctrl_handler.error) {
int err = foo->ctrl_handler.error;
v4l2_ctrl_handler_free(&foo->ctrl_handler);
return err;
}
if (foo->ctrl_handler.error)
return v4l2_ctrl_handler_free(&foo->ctrl_handler);
The :c:func:`v4l2_ctrl_new_std` function returns the v4l2_ctrl pointer to
the new control, but if you do not need to access the pointer outside the