net: bcmgenet: fix OF child-node lookup

Use the new of_get_compatible_child() helper to lookup the mdio child
node 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-child) 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 node of the device being probed).

Fixes: aa09677cba42 ("net: bcmgenet: add MDIO routines")
Cc: stable <[email protected]>     # 3.15
Cc: David S. Miller <[email protected]>
Reviewed-by: Florian Fainelli <[email protected]>
Signed-off-by: Johan Hovold <[email protected]>
Signed-off-by: Rob Herring <[email protected]>

0 files changed, 0 insertions, 0 deletions