[BUG FIX] PM / cpu_domains: Check for NULL callbacks

[Lina Iyer]

Ignore this patch pls. This change has been folded in.

Thanks,
Lina

On Tue, Mar 01 2016 at 14:15 -0700, Lina Iyer wrote:
>Check for NULL platform callback before calling.
>
>Signed-off-by: Lina Iyer <lina.iyer at linaro.org>
>---
> drivers/base/power/cpu_domains.c | 10 ++++++++--
> 1 file changed, 8 insertions(+), 2 deletions(-)
>
>diff --git a/drivers/base/power/cpu_domains.c b/drivers/base/power/cpu_domains.c
>index 7069411..bcaa474 100644
>--- a/drivers/base/power/cpu_domains.c
>+++ b/drivers/base/power/cpu_domains.c
>@@ -157,16 +157,22 @@ static int cpu_pd_power_on(struct generic_pm_domain *genpd)
> {
> 	struct cpu_pm_domain *pd = to_cpu_pd(genpd);
>
>-	return pd->ops.power_on();
>+	if (pd->ops.power_on)
>+		return pd->ops.power_on();
>+
>+	return 0;
> }
>
> static int cpu_pd_power_off(struct generic_pm_domain *genpd)
> {
> 	struct cpu_pm_domain *pd = to_cpu_pd(genpd);
>
>-	return pd->ops.power_off(genpd->state_idx,
>+	if (pd->ops.power_off)
>+		return pd->ops.power_off(genpd->state_idx,
> 			genpd->states[genpd->state_idx].param,
> 			pd->cpus);
>+
>+	return 0;
> }
>
> /**
>-- 
>2.1.4
>