[PATCH V2 2/6] Thermal: make sure cpufreq cooling register after cpufreq driver
From: hongbo.zhang <hidden>
Date: 2012-10-24 11:59:12
Also in:
lkml
Subsystem:
the rest, thermal · Maintainers:
Linus Torvalds, Rafael J. Wysocki, Daniel Lezcano
From: "hongbo.zhang" <redacted> 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 <redacted> --- 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