4.9-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold johan@kernel.org
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 | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/soc/tegra/pmc.c +++ b/drivers/soc/tegra/pmc.c @@ -1189,7 +1189,7 @@ static void tegra_pmc_init_tsense_reset( if (!pmc->soc->has_tsense_reset) return;
- np = of_find_node_by_name(pmc->dev->of_node, "i2c-thermtrip"); + np = of_get_child_by_name(pmc->dev->of_node, "i2c-thermtrip"); if (!np) { dev_warn(dev, "i2c-thermtrip node not found, %s.\n", disabled); return;