drm/mediatek: fix OF sibling-node lookup

Use the new of_get_compatible_child() helper to lookup the sibling
instead of using of_find_compatible_node(), which searches the entire
tree from a given start node and thus can return an unrelated (i.e.
non-sibling) node.

This also addresses a potential use-after-free (e.g. after probe
deferral) as the tree-wide helper drops a reference to its first
argument (i.e. the parent device node).

While at it, also fix the related cec-node reference leak.

Fixes: 8f83f26891e1 ("drm/mediatek: Add HDMI support")
Cc: stable <[email protected]>     # 4.8
Cc: Junzhi Zhao <[email protected]>
Cc: Philipp Zabel <[email protected]>
Cc: CK Hu <[email protected]>
Cc: David Airlie <[email protected]>
Signed-off-by: Johan Hovold <[email protected]>
Signed-off-by: Rob Herring <[email protected]>

0 files changed, 0 insertions, 0 deletions