Hi, I'm new to report issues so please ask for more information if needed. I am running multiple cameras on a single USB3.0 port using USB2.0 (using a micro-B connector) and get this backtrace after running a few times. Is there a way to get around or fix this? Here is my system. Linux linaro-developer 3.4.0-eagle8074 #1 SMP PREEMPT Tue Jun 7 12:20:42 PDT 2016 armv7l armv7l armv7l GNU/Linux Here is the panic message. [ 39.215078] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 39.222130] pgd = f4478000 [ 39.224820] [00000000] *pgd=35348831, *pte=00000000, *ppte=00000000 [ 39.231076] Internal error: Oops: 17 [#1] PREEMPT SMP ARM [ 39.236454] Modules linked in: wlan(O) [ 39.240187] CPU: 0 Tainted: G O (3.4.0-eagle8074 #1) [ 39.246357] PC is at xhci_free_segments_for_ring+0x1c/0x74 [ 39.251822] LR is at init_thread_union+0x1f4c/0x2000 [ 39.256766] pc : [<c050828c>] lr : [<c0f0ff4c>] psr: 00000093 [ 39.256768] sp : f4babcd8 ip : 00000000 fp : f4babd2c [ 39.268223] r10: 00000020 r9 : 00000000 r8 : 00000000 [ 39.273430] r7 : 00000000 r6 : f57ae800 r5 : f447c300 r4 : 00000000 [ 39.279943] r3 : 00000001 r2 : 02389000 r1 : 0007ed18 r0 : 02389000 [ 39.286455] Flags: nzcv IRQs off FIQs on Mode SVC_32 ISA ARM Segment user [ 39.293658] Control: 10c5787d Table: 3447806a DAC: 00000015 [ 39.299387] [ 39.299389] PC: 0xc050820c: [ 39.303638] 820c e3540008 1affffee e59f7050 e28d4060 e3a06000 e5143004 e2441010 e1a00005 [ 39.311799] 822c e2844014 e58d3000 e5143014 e58d600c e98d0088 e891000e ebfffef8 e3500000 [ 39.319957] 824c ba000003 e2866001 e3560008 1afffff0 e3a00000 e28dd0f4 e8bd80f0 c0cdef94 [ 39.328117] 826c c0caddd9 e92d41f0 e1a06000 e5914004 e1a05001 e3a07000 e1540005 0a00000a [ 39.336277] 828c e8940102 e3510000 0a000003 e5960498 e5942008 ebf509b9 e5847000 e1a00004 [ 39.344438] 82ac e1a04008 ebf5159a eafffff2 e5951000 e3510000 0a000004 e5960498 e5952008 --Brandon -- 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
