Re: [PATCH V2 7/8] ARM: cpuidle: Register per cpuidle device

Lorenzo Pieralisi
2015-03-19T11:38:24Z

On Thu, Mar 19, 2015 at 11:27:20AM +0000, Daniel Lezcano wrote:

[...]

> >> for_each_possible_cpu(cpu) {
> >> ret = arm_cpuidle_init(cpu);
> >> +
> >> + /* This cpu does not support any idle states */
> >> + if (ret == -ENOSYS)
> >> + continue;
> >> +
> >> if (ret) {
> >> pr_err("CPU %d failed to init idle CPU ops\n", cpu);
> >> - return ret;
> >> + goto out_fail;
> >> + }
> >> +
> >> + dev = kzalloc(sizeof(*dev), GFP_KERNEL);
> >> + if (!dev) {
> >> + pr_err("Failed to allocate cpuidle device\n");
> >> + goto out_fail;
> >> + }
> >> +
> >> + dev->cpu = cpu;
> >> + per_cpu(cpuidle_arm_dev, cpu) = dev;
> >> +
> >> + ret = cpuidle_register_device(dev);
> >> + if (ret) {
> >> + pr_err("Failed to register cpuidle device for CPU %d\n",
> >> + cpu);
> >> + kfree(dev);
> >> + goto out_fail;
> >> }
> >> }
> >> +out:
> >> + return ret;
> >
> > return 0;
> >
> >>
> >> - return cpuidle_register(drv, NULL);
> >> +out_fail:
> >> + for (cpu--; cpu <= 0; cpu--) {
> >
> > This loop is wrong.
>
> Why is it wrong ? We have to initialize at cpu - 1 to unregister the
> previous registered cpu, not the current one, no ?

Yes, but on cpu>=0 not cpu<=0

while (--cpu >= 0)

?

Lorenzo
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html