[FS#473] ath9k unstable - kernel panic every ~5 minutes

[LEDE Bugs]

The following task has a new comment added:

FS#473 - ath9k unstable - kernel panic every ~5 minutes
User who did this - Mauro Mozzarelli (ezplanet)

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@Toke

I tested on BT Home Hub 5 SNAPSHOT r3392-a3408a5 with airtime_flags set to 1 
It crashed almost immediately:


[  124.039765] INFO: rcu_sched self-detected stall on CPU
[  124.043467] 	0-...: (1 GPs behind) idle=cf1/2/0 softirq=5570/5570 fqs=15000 
[  124.050496] 	 (t=15000 jiffies g=2724 c=2723 q=26)
[  124.055284] Task dump for CPU 0:
[  124.058507] swapper/0       R running      0     0      0 0x00100004
[  124.064859] Stack : 00000000 800732d8 00000000 800732d8 00000000 00000006 00000006 80690000
	  00000000 00000000 00000000 00000000 80696da2 00000000 80696da0 00000000
	  00000000 00000001 80539918 8053d840 8053d840 80530000 00000000 80530000
	  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
	  00000000 00000000 00000000 00000000 00000000 00000000 00000000 dc8ba62f
	  ...
[  124.100369] Call Trace:
[  124.102828] [] show_stack+0x50/0x84
[  124.107190] [] rcu_dump_cpu_stacks+0x98/0xf8
[  124.112318] [] rcu_check_callbacks+0x2d0/0x7d4
[  124.117628] [] update_process_times+0x3c/0x78
[  124.122843] [] tick_sched_timer+0x22c/0x294
[  124.127896] [] __hrtimer_run_queues+0xfc/0x1d4
[  124.133200] [] hrtimer_interrupt+0xfc/0x2c0
[  124.138255] [] c0_compare_interrupt+0x98/0xcc
[  124.143486] [] handle_irq_event_percpu+0x7c/0x1b4
[  124.149052] [] handle_percpu_irq+0x88/0xb8
[  124.154004] [] generic_handle_irq+0x40/0x58
[  124.159051] [] do_IRQ+0x1c/0x2c
[  124.163071] [] plat_irq_dispatch+0xac/0xdc
[  124.168018] [] except_vec_vi_end+0xb4/0xc0
[  124.172969] 

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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=473#comment1751