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Subject[PATCH V2 1/5] OPP: Improve _find_table_of_opp_np()
Date
Make _find_table_of_opp_np() more efficient by using of_get_parent() to
find the parent OPP table node.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
drivers/opp/of.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index 840f85181a37..04968b6a9708 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c
@@ -114,19 +114,25 @@ static struct device_node *of_parse_required_opp(struct device_node *np,
static struct opp_table *_find_table_of_opp_np(struct device_node *opp_np)
{
struct opp_table *opp_table;
- struct dev_pm_opp *opp;
+ struct device_node *opp_table_np;

lockdep_assert_held(&opp_table_lock);

+ opp_table_np = of_get_parent(opp_np);
+ if (!opp_table_np)
+ goto err;
+
+ /* It is safe to put the node now as all we need now is its address */
+ of_node_put(opp_table_np);
+
list_for_each_entry(opp_table, &opp_tables, node) {
- opp = _find_opp_of_np(opp_table, opp_np);
- if (opp) {
- dev_pm_opp_put(opp);
+ if (opp_table_np == opp_table->np) {
_get_opp_table_kref(opp_table);
return opp_table;
}
}

+err:
return ERR_PTR(-ENODEV);
}

--
2.19.1.568.g152ad8e3369a
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