Hi Felipe, I am trying to bring up a DWC USB 3.0 Host with linux (v4.6-rc5) running in a ARM64 development board. I have implemented the following suggested fix to overcome the DMA problem I was having: https://lkml.org/lkml/2016/3/31/609 I received one interrupt but I am getting cyclic crashes like this: [<ffffff8008086c60>] __switch_to+0xc8/0xd4 [<ffffff80086386d4>] __schedule+0x18c/0x5c8 [<ffffff8008638b48>] schedule+0x38/0x98 [<ffffff800863b67c>] schedule_timeout+0x160/0x1ac [<ffffff8008639674>] wait_for_common+0xac/0x150 [<ffffff800863972c>] wait_for_completion+0x14/0x1c [<ffffff80084898f4>] xhci_alloc_dev+0xf4/0x2a0 [<ffffff800844ffd0>] usb_alloc_dev+0x68/0x2cc [<ffffff8008456994>] hub_event+0x784/0x11f4 [<ffffff80080ce444>] process_one_work+0x130/0x2f4 [<ffffff80080ce65c>] worker_thread+0x54/0x434 [<ffffff80080d40fc>] kthread+0xd4/0xe8 [<ffffff8008085e10>] ret_from_fork+0x10/0x40 Any thoughts about what might be happening? Thanks. Joao -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html