net: bcmgenet: fix OF child-node lookup

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commit d397dbe606 upstream.

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: aa09677cba ("net: bcmgenet: add MDIO routines")
Cc: David S. Miller <davem@davemloft.net>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Johan Hovold 2018-08-27 10:21:50 +02:00 • committed by Ben Hutchings

parent 6c4c6f8946

commit 4d06efc1bc

1 changed files with 1 additions and 1 deletions

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drivers/net/ethernet/broadcom/genet/bcmmii.c

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