Commit 4d1cd144 authored by Daniel Lezcano's avatar Daniel Lezcano Committed by Rafael J. Wysocki
Browse files

powercap: DTPM: Fix suspend failure and kernel warning 



When the ENERGY_MODEL and DTPM_CPU are enabled but actually without
any energy model, at cpu hotplug time, the dead cpuhp callback fails
leading to the warning.

Actually, the check could be simplified and we only do an action if
the dtpm cpu is enabled, otherwise we bail out without error.

Fixes: 7a89d7ea ("powercap/drivers/dtpm: Simplify the dtpm table")
Reported-by: default avatarKenneth R. Crudup <kenny@panix.com>
Tested-by: default avatarKenneth R. Crudup <kenny@panix.com>
Reported-by: default avatarkernel test robot <oliver.sang@intel.com>
Signed-off-by: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 88100752

drivers/powercap/dtpm_cpu.c

+3 −6
Original line number Diff line number Diff line
@@ -166,16 +166,13 @@ static struct dtpm_ops dtpm_ops = { 


static int cpuhp_dtpm_cpu_offline(unsigned int cpu)

{

	struct em_perf_domain *pd;

	struct dtpm_cpu *dtpm_cpu;



	pd = em_cpu_get(cpu);

	if (!pd)

		return -EINVAL;



	dtpm_cpu = per_cpu(dtpm_per_cpu, cpu);

	if (dtpm_cpu)

		dtpm_update_power(&dtpm_cpu->dtpm);



	return dtpm_update_power(&dtpm_cpu->dtpm);

	return 0;

}



static int cpuhp_dtpm_cpu_online(unsigned int cpu)