soc/tegra: pmc: Fix child-node lookup
authorJohan Hovold <johan@kernel.org>
Wed, 15 Nov 2017 09:44:58 +0000 (10:44 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 13 Nov 2018 19:15:12 +0000 (11:15 -0800)
commit59bc2d3a68ad99c72972caadfa350e758af65e8b
tree6c4e621916a2a95a5302d5508fbfd8812a268f18
parent1258e45dc460aa29dd70fd715fd1624b7ab93ef1
soc/tegra: pmc: Fix child-node lookup

commit 1dc6bd5e39a29453bdcc17348dd2a89f1aa4004e upstream.

Fix child-node lookup during probe, which ended up searching the whole
device tree depth-first starting at the parent rather than just matching
on its children.

To make things worse, the parent pmc node could end up being prematurely
freed as of_find_node_by_name() drops a reference to its first argument.

Fixes: 3568df3d31d6 ("soc: tegra: Add thermal reset (thermtrip) support to PMC")
Cc: stable <stable@vger.kernel.org> # 4.0
Cc: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/soc/tegra/pmc.c