linux-kernel - [PATCH v3 01/12] opp: Fix adding OPP entries in a wrong order if rate is unavailable

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Message-Id: <20210118005524.27787-2-digetx@gmail.com>
Date:   Mon, 18 Jan 2021 03:55:13 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Peter Geis <pgwipeout@...il.com>,
        Nicolas Chauvet <kwizart@...il.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Kevin Hilman <khilman@...nel.org>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        Viresh Kumar <vireshk@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>, Nishanth Menon <nm@...com>,
        Yangtao Li <tiny.windzz@...il.com>,
        Matt Merhar <mattmerhar@...tonmail.com>
Cc:     linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-pm@...r.kernel.org
Subject: [PATCH v3 01/12] opp: Fix adding OPP entries in a wrong order if rate is unavailable

Fix adding OPP entries in a wrong (opposite) order if OPP rate is
unavailable. The OPP comparison was erroneously skipped, thus OPPs
were left unsorted.

Tested-by: Peter Geis <pgwipeout@...il.com>
Tested-by: Nicolas Chauvet <kwizart@...il.com>
Tested-by: Matt Merhar <mattmerhar@...tonmail.com>
Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/opp/core.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index dfc4208d3f87..48618ff3e99e 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -1527,12 +1527,10 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
 	mutex_lock(&opp_table->lock);
 	head = &opp_table->opp_list;
 
-	if (likely(!rate_not_available)) {
-		ret = _opp_is_duplicate(dev, new_opp, opp_table, &head);
-		if (ret) {
-			mutex_unlock(&opp_table->lock);
-			return ret;
-		}
+	ret = _opp_is_duplicate(dev, new_opp, opp_table, &head);
+	if (ret) {
+		mutex_unlock(&opp_table->lock);
+		return ret;
 	}
 
 	list_add(&new_opp->node, head);
-- 
2.29.2