Hi, everyone
When i.mx6qp runs for a period of time, we have the chance to meet the following error:
cpu cpu0: failed to scale vddpu up: -110
cpufreq: __target_index: Failed to change cpu frequency: -110
cpu cpu0: failed to scale vddpu up: -110
cpufreq: __target_index: Failed to change cpu frequency: -110
cpu cpu0: failed to scale vddpu up: -110
cpufreq: __target_index: Failed to change cpu frequency: -110
INFO: rcu_preempt detected stalls on CPUs/tasks:
(detected by 1, t=235387 jiffies, g=124398, c=124397, q=32292)
All QSes seen, last rcu_preempt kthread activity 99719 (4768778-4669059), jiffies_till_next_fqs=1, root ->qsmask 0x0
swapper/1 R running task 0 0 1 0x00000000
[<8010eb64>] (unwind_backtrace) from [<8010b180>] (show_stack+0x10/0x14)
[<8010b180>] (show_stack) from [<8017e494>] (rcu_check_callbacks+0x9bc/0x9c8)
[<8017e494>] (rcu_check_callbacks) from [<80181628>] (update_process_times+0x34/0x5c)
[<80181628>] (update_process_times) from [<801924a4>] (tick_sched_timer+0x54/0x98)
[<801924a4>] (tick_sched_timer) from [<80182594>] (__hrtimer_run_queues+0x118/0x1ac)
[<80182594>] (__hrtimer_run_queues) from [<801827f0>] (hrtimer_interrupt+0xa8/0x1f8)
[<801827f0>] (hrtimer_interrupt) from [<8010e49c>] (twd_handler+0x30/0x38)
[<8010e49c>] (twd_handler) from [<80174a70>] (handle_percpu_devid_irq+0x8c/0x144)
[<80174a70>] (handle_percpu_devid_irq) from [<8016ff00>] (generic_handle_irq+0x24/0x34)
[<8016ff00>] (generic_handle_irq) from [<80170428>] (__handle_domain_irq+0x7c/0xec)
[<80170428>] (__handle_domain_irq) from [<801014e8>] (gic_handle_irq+0x48/0x8c)
[<801014e8>] (gic_handle_irq) from [<8010bc8c>] (__irq_svc+0x6c/0xa8)
Exception stack(0xa80a9f68 to 0xa80a9fb0)
9f60: 00000001 80b0ab1c 00000001 2a993000 b050fef1 00002a57
9f80: ab70ae30 00000000 b0e951bc 00002a57 00000000 00000050 29aaaaab a80a9fb8
9fa0: 80166ee8 80668870 200f0013 ffffffff
What's the problem ? Thanks
