[PATCH V2 2/6] Thermal: make sure cpufreq cooling register after cpufreq driver

[hongbo.zhang]

From: "hongbo.zhang" <hongbo.zhang@xxxxxxxxxx>

The cpufreq works as a cooling device, so the cooling layer should check if the
cpufreq driver is initialized or not.

Signed-off-by: hongbo.zhang <hongbo.zhang@xxxxxxxxxx>
---
 drivers/thermal/cpu_cooling.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c
index b6b4c2a..7519a0b 100644
--- a/drivers/thermal/cpu_cooling.c
+++ b/drivers/thermal/cpu_cooling.c
@@ -354,6 +354,10 @@ struct thermal_cooling_device *cpufreq_cooling_register(
 	int ret = 0, i;
 	struct cpufreq_policy policy;
 
+	/* make sure cpufreq driver has been initialized */
+	if (!cpufreq_frequency_get_table(cpumask_any(clip_cpus)))
+		return ERR_PTR(-EPROBE_DEFER);
+
 	list_for_each_entry(cpufreq_dev, &cooling_cpufreq_list, node)
 		cpufreq_dev_count++;
 
-- 
1.7.11.3

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