linux-kernel - [PATCH 2/2] cpuidle: riscv-sbi: Fix code to allow a genpd governor to be used

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Date:   Sat, 14 May 2022 17:20:44 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Anup Patel <anup@...infault.org>, linux-pm@...r.kernel.org
Cc:     Sudeep Holla <sudeep.holla@....com>,
        Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
        Maulik Shah <quic_mkshah@...cinc.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Atish Patra <atishp@...osinc.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] cpuidle: riscv-sbi: Fix code to allow a genpd governor to be used

The intent is to use a genpd governor when there are some states that needs
to be managed. Although, the current code ends up to never assign a
governor, let's fix this.

Fixes: 6abf32f1d9c50 ("cpuidle: Add RISC-V SBI CPU idle driver")
Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
---
 drivers/cpuidle/cpuidle-riscv-sbi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/cpuidle/cpuidle-riscv-sbi.c b/drivers/cpuidle/cpuidle-riscv-sbi.c
index b459eda2cd37..478970fa3b0c 100644
--- a/drivers/cpuidle/cpuidle-riscv-sbi.c
+++ b/drivers/cpuidle/cpuidle-riscv-sbi.c
@@ -413,7 +413,7 @@ static int sbi_pd_init(struct device_node *np)
 	struct generic_pm_domain *pd;
 	struct sbi_pd_provider *pd_provider;
 	struct dev_power_governor *pd_gov;
-	int ret = -ENOMEM, state_count = 0;
+	int ret = -ENOMEM;
 
 	pd = dt_idle_pd_alloc(np, sbi_dt_parse_state_node);
 	if (!pd)
@@ -432,7 +432,7 @@ static int sbi_pd_init(struct device_node *np)
 		pd->flags |= GENPD_FLAG_ALWAYS_ON;
 
 	/* Use governor for CPU PM domains if it has some states to manage. */
-	pd_gov = state_count > 0 ? &pm_domain_cpu_gov : NULL;
+	pd_gov = pd->states ? &pm_domain_cpu_gov : NULL;
 
 	ret = pm_genpd_init(pd, pd_gov, false);
 	if (ret)
-- 
2.25.1