I have an x86 PC, it oops, and I took a screenshot: http://babyaries.org/mirror/picture/2015-01-13-165845_1600x900_scrot.png Then I browsed the xhci source code, compared with the oops machine code: http://babyaries.org/mirror/picture/2015-01-14-113248_1600x900_scrot.png I found that it's because deq_state->new_deq_seg is an invalid pointer that makes my PC oops. -- 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