[PATCH 5.18 500/879] cpuidle: riscv-sbi: Fix code to allow a genpd governor to be used

Greg Kroah-Hartman
2022-06-08T01:42:11Z

From: Ulf Hansson <ulf.hansson@linaro.org>

[ Upstream commit a6653fb584b5f6ac60ddd5d86ddd49a1f3945a04 ]

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@linaro.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
Tested-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.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 5c852e671992..1151e5e2ba82 100644
--- a/drivers/cpuidle/cpuidle-riscv-sbi.c
+++ b/drivers/cpuidle/cpuidle-riscv-sbi.c
@@ -414,7 +414,7 @@ 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)
@@ -433,7 +433,7 @@ 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)
--
2.35.1