On 03/19/2015 12:38 PM, Lorenzo Pieralisi wrote:
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)
Ah, yes. Thanks for spotting this.
-- Daniel
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