[PATCH 04/12] PM / OPP: Take reference of the OPP table while adding/removing OPPs
From: Viresh Kumar <viresh.kumar@linaro.org>
Date: 2016-12-07 10:50:22
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Subsystem:
driver core, kobjects, debugfs and sysfs, hibernation (aka software suspend, aka swsusp), power management core, suspend to ram, the rest · Maintainers:
Greg Kroah-Hartman, "Rafael J. Wysocki", Danilo Krummrich, Linus Torvalds
Take reference of the OPP table while adding and removing OPPs, that helps us remove special checks in _remove_opp_table(). Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> --- drivers/base/power/opp/core.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/base/power/opp/core.c b/drivers/base/power/opp/core.c
index 472f93755945..aacca85ebd20 100644
--- a/drivers/base/power/opp/core.c
+++ b/drivers/base/power/opp/core.c@@ -971,9 +971,6 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_put_opp_table); */ static void _remove_opp_table(struct opp_table *opp_table) { - if (!list_empty(&opp_table->opp_list)) - return; - dev_pm_opp_put_opp_table_unlocked(opp_table); }
@@ -1018,8 +1015,7 @@ static void _opp_remove(struct opp_table *opp_table, struct dev_pm_opp *opp) call_srcu(&opp_table->srcu_head.srcu, &opp->rcu_head, _kfree_opp_rcu); mutex_unlock(&opp_table->lock); - - _remove_opp_table(opp_table); + dev_pm_opp_put_opp_table(opp_table); } /**
@@ -1171,6 +1167,9 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp, new_opp->opp_table = opp_table; + /* Get a reference to the OPP table */ + _get_opp_table_kref(opp_table); + ret = opp_debug_create_one(new_opp, opp_table); if (ret) dev_err(dev, "%s: Failed to register opp to debugfs (%d)\n",
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2.7.1.410.g6faf27b