panic at AR9132 by USB hi load

[Mori Hiroki]

Hi

I use Buffalo WZR-HP-G300NH. This is AR9132.
This target have USB interface.

This device is panic by USB hi load.

For example I use USB sound module and this command make panic soon.

% cat /dev/dsp > /dev/null

Trap cause = 5 (address error (store) - kernel mode)
[ thread pid 13 tid 100025 ]
Stopped at      0
db> trace
Tracing pid 13 tid 100025 td 0x80772780
feeder_matrix_oss_set_channel_order+0x19f8 (?,?,?,?) ra 80127064 sp c06c3bc0 sz 
0
feeder_matrix_oss_set_channel_order+0x4690 (?,?,7bf,?) ra 0 sp c06c3bc0 sz 0
db> show thread
Thread 100025 at 0x80772780:
 proc (pid 13): 0x8076c388
 name: usbus0
 stack: 0xc06c2000-0xc06c3fff
 flags: 0x1000004  pflags: 0x200000
 state: RUNNING (CPU 0)
 priority: 24
 container lock: sched lock (0x80598700)
 last voluntary switch: 34 ms ago

I use dump1090 program by RTL2838UHIDIR USB dongle on AR9132.
This have no problem. I think this is not so hi load.

I also use Buffalo WZR-HP-AG300H(AR7161).
This target is work fine on hi load.

If you have advice, Please let me know.

Regards

Hiroki Mori