linux-kernel - [PATCH 2/3] PM: domains: Restructure some code in __genpd_dev_pm

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Date:   Thu,  2 Sep 2021 12:16:33 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Dmitry Osipenko <digetx@...il.com>, linux-pm@...r.kernel.org
Cc:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        Stephan Gerhold <stephan@...hold.net>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Ulf Hansson <ulf.hansson@...aro.org>
Subject: [PATCH 2/3] PM: domains: Restructure some code in __genpd_dev_pm_attach()

To slightly improve readability of the code, but also to prepare for a
subsequent change on top, let's move the code that calls
of_get_required_opp_performance_state() into a new separate function.

Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
---
 drivers/base/power/domain.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 278e040f607f..800adf831cae 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -2640,6 +2640,17 @@ static void genpd_dev_pm_sync(struct device *dev)
 	genpd_queue_power_off_work(pd);
 }
 
+static int genpd_get_default_performance_state(struct device *dev,
+					       unsigned int index)
+{
+	int pstate = of_get_required_opp_performance_state(dev->of_node, index);
+
+	if (pstate == -ENODEV || pstate == -EOPNOTSUPP)
+		return 0;
+
+	return pstate;
+}
+
 static int __genpd_dev_pm_attach(struct device *dev, struct device *base_dev,
 				 unsigned int index, bool power_on)
 {
@@ -2690,8 +2701,8 @@ static int __genpd_dev_pm_attach(struct device *dev, struct device *base_dev,
 	}
 
 	/* Set the default performance state */
-	pstate = of_get_required_opp_performance_state(dev->of_node, index);
-	if (pstate < 0 && pstate != -ENODEV && pstate != -EOPNOTSUPP) {
+	pstate = genpd_get_default_performance_state(dev, index);
+	if (pstate < 0) {
 		ret = pstate;
 		goto err;
 	} else if (pstate > 0) {
-- 
2.25.1