linux-kernel - [PATCH 3/5] OPP: Reorder code in _opp_set_required_opps

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Message-Id: <a5bd698a7a899fb63b4c5caec7068bf5a395165c.1697186772.git.viresh.kumar@linaro.org>
Date:   Fri, 13 Oct 2023 14:18:39 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        Stephen Boyd <sboyd@...nel.org>
Cc:     Viresh Kumar <viresh.kumar@...aro.org>, linux-pm@...r.kernel.org,
        Vincent Guittot <vincent.guittot@...aro.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 3/5] OPP: Reorder code in _opp_set_required_opps_genpd()

Reorder code in _opp_set_required_opps_genpd() to reduce duplicate code.

Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
 drivers/opp/core.c | 34 +++++++++++++++++++---------------
 1 file changed, 19 insertions(+), 15 deletions(-)

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index f42b663a4d8b..3516e79cf743 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -1076,7 +1076,18 @@ static int _opp_set_required_opps_genpd(struct device *dev,
 {
 	struct device **genpd_virt_devs =
 		opp_table->genpd_virt_devs ? opp_table->genpd_virt_devs : &dev;
-	int i, ret = 0;
+	int index, target, delta, ret;
+
+	/* Scaling up? Set required OPPs in normal order, else reverse */
+	if (!scaling_down) {
+		index = 0;
+		target = opp_table->required_opp_count;
+		delta = 1;
+	} else {
+		index = opp_table->required_opp_count - 1;
+		target = -1;
+		delta = -1;
+	}
 
 	/*
 	 * Acquire genpd_virt_dev_lock to make sure we don't use a genpd_dev
@@ -1084,24 +1095,17 @@ static int _opp_set_required_opps_genpd(struct device *dev,
 	 */
 	mutex_lock(&opp_table->genpd_virt_dev_lock);
 
-	/* Scaling up? Set required OPPs in normal order, else reverse */
-	if (!scaling_down) {
-		for (i = 0; i < opp_table->required_opp_count; i++) {
-			ret = _set_performance_state(dev, genpd_virt_devs[i], opp, i);
-			if (ret)
-				break;
-		}
-	} else {
-		for (i = opp_table->required_opp_count - 1; i >= 0; i--) {
-			ret = _set_performance_state(dev, genpd_virt_devs[i], opp, i);
-			if (ret)
-				break;
-		}
+	while (index != target) {
+		ret = _set_performance_state(dev, genpd_virt_devs[index], opp, index);
+		if (ret)
+			break;
+
+		index += delta;
 	}
 
 	mutex_unlock(&opp_table->genpd_virt_dev_lock);
 
-	return ret;
+	return 0;
 }
 
 /* This is only called for PM domain for now */
-- 
2.31.1.272.g89b43f80a514