Backtrace: 
[<c0033514>] (__wake_up_common+0x0/0x7c) from [<c00336e4>] (complete+0x54/0x78)
[<c0033690>] (complete+0x0/0x78) from [<c015edac>] (usb_api_blocking_completion+0x14/0x18)
 r5 = C10B4DA0  r4 = C1FFB800 
[<c015ed98>] (usb_api_blocking_completion+0x0/0x18) from [<c015cef0>] (usb_hcd_giveback_urb+0x50/0x9c)
[<c015cea0>] (usb_hcd_giveback_urb+0x0/0x9c) from [<c01698c4>] (finish_request+0x9c/0x134)
 r6 = C1E972A0  r5 = C10B4DA0  r4 = C1F18000 
[<c0169828>] (finish_request+0x0/0x134) from [<c016a0b4>] (done+0x758/0x7e4)
[<c016995c>] (done+0x0/0x7e4) from [<c016a3d0>] (dm320h_irq+0x134/0x294)
[<c016a29c>] (dm320h_irq+0x0/0x294) from [<c015df5c>] (usb_hcd_irq+0x40/0x84)
[<c015df1c>] (usb_hcd_irq+0x0/0x84) from [<c0022020>] (__do_irq+0x6c/0xb4)
 r4 = C1E75980 
[<c0021fb4>] (__do_irq+0x0/0xb4) from [<c0022188>] (do_edge_IRQ+0xb0/0x12c)
[<c00220d8>] (do_edge_IRQ+0x0/0x12c) from [<c0022314>] (asm_do_IRQ+0x54/0x148)
 r7 = 00000001  r6 = C1F19E04  r5 = C1F18000  r4 = FFFFFFFF
[<c00222c0>] (asm_do_IRQ+0x0/0x148) from [<c0020ed8>] (__irq_svc+0x38/0x60)
[<bf1fa438>] (RTUSBReadMACRegister+0x0/0x48 [rt73]) from [<bf1fa574>] (RTUSBWriteBBPRegister+0x34/0x10c [rt73])
[<bf1fa540>] (RTUSBWriteBBPRegister+0x0/0x10c [rt73]) from [<bf1fd274>] (ScanNextChannel+0x298/0x69c [rt73])
 r8 = C1F19E7C  r7 = C0AA0000  r6 = BF2397E4  r5 = 00000013
 r4 = 0000B291 
[<bf1fcfdc>] (ScanNextChannel+0x0/0x69c [rt73]) from [<bf1fd854>] (MlmeScanReqAction+0x1ac/0x22c [rt73])
[<bf1fd6a8>] (MlmeScanReqAction+0x0/0x22c [rt73]) from [<bf1ecc7c>] (StateMachinePerformAction+0x34/0x38 [rt73])
 r8 = 20000013  r7 = 00000000  r6 = 00000000  r5 = C1F18000
 r4 = C0AA0000 
[<bf1ecc48>] (StateMachinePerformAction+0x0/0x38 [rt73]) from [<bf1f2a0c>] (MlmeWork+0x1d8/0x2c0 [rt73])
[<bf1f2834>] (MlmeWork+0x0/0x2c0 [rt73]) from [<c0048a48>] (worker_thread+0x1f8/0x2ac)
 r7 = C02FB6E0  r6 = C0ABE208  r5 = C1F18000  r4 = C0ABE20C
[<c0048850>] (worker_thread+0x0/0x2ac) from [<c004d8b8>] (kthread+0xec/0x11c)
[<c004d7cc>] (kthread+0x0/0x11c) from [<c0039280>] (do_exit+0x0/0xc1c)
Code: bad PC value.
 <0>Kernel panic - not syncing: Aiee, killing interrupt handler!