| Message ID | 20241107113841.989475-1-ruanjinjie@huawei.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [v2,RESEND] cpufreq: mediatek-hw: Fix wrong return value in mtk_cpufreq_get_cpu_power() | expand |
On 07-11-24, 19:38, Jinjie Ruan wrote: > 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> > --- > v2 -> v2 RESEND: > - Update the commit subject and Cc Viresh. > - Add Reviewed-by. > v2: > - Fix the driver instead of em_create_perf_table() as suggested. > - Update the commit message. > - Add Suggested-by. > --- > drivers/cpufreq/mediatek-cpufreq-hw.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) Applied. Thanks.
diff --git a/drivers/cpufreq/mediatek-cpufreq-hw.c b/drivers/cpufreq/mediatek-cpufreq-hw.c index 8925e096d5b9..aeb5e6304542 100644 --- 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 *cpu_dev, unsigned long *uW, policy = cpufreq_cpu_get_raw(cpu_dev->id); if (!policy) - return 0; + return -EINVAL; data = policy->driver_data;
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> --- v2 -> v2 RESEND: - Update the commit subject and Cc Viresh. - Add Reviewed-by. v2: - Fix the driver instead of em_create_perf_table() as suggested. - Update the commit message. - Add Suggested-by. --- drivers/cpufreq/mediatek-cpufreq-hw.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)