If LMH (Limits Management Hardware) is available, when a policy is
disabled by unplugging the last online CPU of policy->cpus,
qcom_cpufreq_hw_cpu_offline() sets cancel_throttle=true.
cancel_throttle is not reset when the policy is re-enabled with any
of the CPU in policy->cpus being plugged in. So reset it.
This patch also adds an early exit check.
Fixes: a1eb080a0447 ("cpufreq: qcom-hw: provide online/offline operations")
Signed-off-by: Pierre Gondois <pierre.gondois@xxxxxxx>
---
drivers/cpufreq/qcom-cpufreq-hw.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c
index 0253731d6d25..8aba73698eda 100644
--- a/drivers/cpufreq/qcom-cpufreq-hw.c
+++ b/drivers/cpufreq/qcom-cpufreq-hw.c
@@ -442,6 +442,13 @@ static int qcom_cpufreq_hw_cpu_online(struct cpufreq_policy *policy)
struct platform_device *pdev = cpufreq_get_driver_data();
int ret;
+ if (data->throttle_irq < 0)
+ return 0;
+
+ mutex_lock(&data->throttle_lock);
+ data->cancel_throttle = false;
+ mutex_unlock(&data->throttle_lock);
+
ret = irq_set_affinity_hint(data->throttle_irq, policy->cpus);
if (ret)
dev_err(&pdev->dev, "Failed to set CPU affinity of %s[%d]\n",
--
2.25.1
