5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jinjie Ruan <ruanjinjie@xxxxxxxxxx>
commit 172bf5ed04cb6c9e66d58de003938ed5c8756570 upstream.
mtk_cpufreq_get_cpu_power() return 0 if the policy is NULL. Then in
em_create_perf_table(), the later zero check for power is not invalid
as power is uninitialized. As Lukasz suggested, it must return -EINVAL when
the 'policy' is not found. So return -EINVAL to fix it.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 4855e26bcf4d ("cpufreq: mediatek-hw: Add support for CPUFREQ HW")
Reviewed-by: Lukasz Luba <lukasz.luba@xxxxxxx>
Suggested-by: Lukasz Luba <lukasz.luba@xxxxxxx>
Signed-off-by: Jinjie Ruan <ruanjinjie@xxxxxxxxxx>
Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/cpufreq/mediatek-cpufreq-hw.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/cpufreq/mediatek-cpufreq-hw.c
+++ b/drivers/cpufreq/mediatek-cpufreq-hw.c
@@ -60,7 +60,7 @@ mtk_cpufreq_get_cpu_power(unsigned long
policy = cpufreq_cpu_get_raw(cpu_dev->id);
if (!policy)
- return 0;
+ return -EINVAL;
data = policy->driver_data;
