[    1.897369] usb usb1: Product: DWC OTG Controller
[    1.905684] usb usb1: Manufacturer: Linux 3.8.13-ipipe dwc_otg_hcd
[    1.915469] usb usb1: SerialNumber: bcm2708_usb
[    1.924459] hub 1-0:1.0: USB hub found
[    1.931967] hub 1-0:1.0: 1 port detected
[    1.939772] ------------[ cut here ]------------
[    1.948056] WARNING: at kernel/irq/handle.c:146 handle_irq_event_percpu+0x198/0x1c0()
[    1.959568] irq 32 handler usb_hcd_irq+0x0/0x84 enabled interrupts
[    1.969414] Modules linked in:
[    1.976113] Backtrace:
[    1.982272] [<c0011e5c>] (dump_backtrace+0x0/0x10c) from [<c044cd4c>] (dump_stack+0x18/0x1c)
[    1.994486]  r6:c007cd1c r5:00000009 r4:cd82bbc0 r3:c05dd250
[    2.004055] [<c044cd34>] (dump_stack+0x0/0x1c) from [<c0021028>] (warn_slowpath_common+0x54/0x6c)
[    2.016765] [<c0020fd4>] (warn_slowpath_common+0x0/0x6c) from [<c0021078>] (warn_slowpath_fmt+0x38/0x40)
[    2.030112]  r8:c05dd250 r7:00000020 r6:00000000 r5:00000000 r4:cd9d73e0
[    2.030112] r3:00000009
[    2.045819] [<c0021040>] (warn_slowpath_fmt+0x0/0x40) from [<c007cd1c>] (handle_irq_event_percpu+0x198/0x1c0)
[    2.059760]  r3:00000020 r2:c05309c8
[    2.067422] [<c007cb84>] (handle_irq_event_percpu+0x0/0x1c0) from [<c007cdb0>] (handle_irq_event+0x6c/0x9c)
[    2.081266] [<c007cd44>] (handle_irq_event+0x0/0x9c) from [<c007fe3c>] (handle_level_irq+0x80/0x110)
[    2.094555]  r5:cd82a038 r4:c05d3f88
[    2.102350] [<c007fdbc>] (handle_level_irq+0x0/0x110) from [<c007c484>] (generic_handle_irq+0x24/0x38)
[    2.115896]  r5:00000020 r4:c05e789c
[    2.123784] [<c007c460>] (generic_handle_irq+0x0/0x38) from [<c000ee70>] (handle_IRQ+0x38/0x8c)
[    2.136875] [<c000ee38>] (handle_IRQ+0x0/0x8c) from [<c001714c>] (__ipipe_do_IRQ+0x14/0x1c)
[    2.149585]  r6:00000000 r5:00000021 r4:c05dd260 r3:c064d6a0
[    2.159712] [<c0017138>] (__ipipe_do_IRQ+0x0/0x1c) from [<c0086138>] (__ipipe_do_sync_stage+0x270/0x28c)
[    2.173685] [<c0085ec8>] (__ipipe_do_sync_stage+0x0/0x28c) from [<c00861dc>] (__ipipe_do_sync_pipeline+0x88/0x9c)
[    2.188518] [<c0086154>] (__ipipe_do_sync_pipeline+0x0/0x9c) from [<c0086694>] (__ipipe_dispatch_irq+0x1d4/0x270)
[    2.203418]  r9:c05dd250 r8:c05dd1e0 r7:00000000 r6:00000021 r5:c05dd250
[    2.203418] r4:00000020
[    2.220600] [<c00864c0>] (__ipipe_dispatch_irq+0x0/0x270) from [<c00083e4>] (__ipipe_grab_irq+0x34/0x78)
[    2.234825]  r9:c05ed8a4 r8:c05cdfc0 r7:cd82bd74 r6:f200b200 r5:60000113
[    2.234825] r4:cd82bd40
[    2.252261] [<c00083b0>] (__ipipe_grab_irq+0x0/0x78) from [<c04534f4>] (__irq_svc+0x34/0xc0)
[    2.265520] Exception stack(0xcd82bd40 to 0xcd82bd88)
[    2.275394] bd40: f2980008 00000000 00000000 c05dd250 00000001 00000000 c05ed7c4 cd9ed380
[    2.288471] bd60: c05cdfc0 c05ed8a4 0000000f cd82bd9c cd82bd88 cd82bd88 c033f254 c033f254
[    2.301604] bd80: 60000113 ffffffff
[    2.309921]  r4:c033f254 r3:c033f254
[    2.318481] [<c033f1e8>] (DWC_MODIFY_REG32+0x0/0x74) from [<c031e930>] (dwc_otg_enable_global_interrupts+0x20/0x24)
[    2.333936]  r4:00000000 r3:cd9efa00
[    2.342574] [<c031e910>] (dwc_otg_enable_global_interrupts+0x0/0x24) from [<c031cd50>] (dwc_otg_driver_probe+0x750/0x7e4)
[    2.358713] [<c031c600>] (dwc_otg_driver_probe+0x0/0x7e4) from [<c02cb0dc>] (platform_drv_probe+0x20/0x24)
[    2.373603] [<c02cb0bc>] (platform_drv_probe+0x0/0x24) from [<c02c9b2c>] (really_probe+0x68/0x1f0)
[    2.387781] [<c02c9ac4>] (really_probe+0x0/0x1f0) from [<c02c9db0>] (__driver_attach+0xa0/0xa4)
[    2.401715]  r7:00000000 r6:c05ce004 r5:c05ed8f8 r4:c05cdfd0
[    2.412745] [<c02c9d10>] (__driver_attach+0x0/0xa4) from [<c02c7fb0>] (bus_for_each_dev+0x68/0x9c)
[    2.427034]  r6:c02c9d10 r5:c05ed8f8 r4:00000000 r3:00000000
[    2.438162] [<c02c7f48>] (bus_for_each_dev+0x0/0x9c) from [<c02c96f8>] (driver_attach+0x20/0x28)
[    2.452346]  r6:c05ebaa8 r5:c05ed8f8 r4:cd9e1420
[    2.462456] [<c02c96d8>] (driver_attach+0x0/0x28) from [<c02c924c>] (bus_add_driver+0xb4/0x24c)
[    2.476658] [<c02c9198>] (bus_add_driver+0x0/0x24c) from [<c02ca4e4>] (driver_register+0x80/0x148)
[    2.491167]  r7:c05f8f00 r6:c05f8f00 r5:00000006 r4:c05ed8f8
[    2.502563] [<c02ca464>] (driver_register+0x0/0x148) from [<c02cb740>] (platform_driver_register+0x4c/0x60)
[    2.517948]  r8:c05b82ac r7:c05f8f00 r6:c05f8f00 r5:00000006 r4:c05be168
[    2.517948] r3:00000000
[    2.537219] [<c02cb6f4>] (platform_driver_register+0x0/0x60) from [<c05b0564>] (dwc_otg_driver_init+0x28/0xe8)
[    2.552995] [<c05b053c>] (dwc_otg_driver_init+0x0/0xe8) from [<c0008730>] (do_one_initcall+0x134/0x1b4)
[    2.568149]  r7:c05f8f00 r6:c05f8f00 r5:00000006 r4:c05be168
[    2.579748] [<c00085fc>] (do_one_initcall+0x0/0x1b4) from [<c059b914>] (kernel_init_freeable+0x100/0x1b8)
[    2.595226] [<c059b814>] (kernel_init_freeable+0x0/0x1b8) from [<c044c4a4>] (kernel_init+0x10/0x158)
[    2.610284] [<c044c494>] (kernel_init+0x0/0x158) from [<c000dfc0>] (ret_from_fork+0x18/0x38)
[    2.624599]  r5:c044c494 r4:00000000
[    2.634082] ---[ end trace 1943770bd91195b5 ]---
[    2.644870] dwc_otg: FIQ enabled
[    2.644894] dwc_otg: NAK holdoff enabled
[    2.644905] dwc_otg: FIQ split fix enabled
[    2.644928] Module dwc_common_port init