6.6-stable review patch. If anyone has any objections, please let me know.
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From: Jinjie Ruan ruanjinjie@huawei.com
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@vger.kernel.org Fixes: 4855e26bcf4d ("cpufreq: mediatek-hw: Add support for CPUFREQ HW") Reviewed-by: Lukasz Luba lukasz.luba@arm.com Suggested-by: Lukasz Luba lukasz.luba@arm.com Signed-off-by: Jinjie Ruan ruanjinjie@huawei.com Signed-off-by: Viresh Kumar viresh.kumar@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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 @@ -62,7 +62,7 @@ mtk_cpufreq_get_cpu_power(struct device
policy = cpufreq_cpu_get_raw(cpu_dev->id); if (!policy) - return 0; + return -EINVAL;
data = policy->driver_data;