Hi Gang,
OK, I’m running the latest 3.14.2 kernel from the latest repo and using the Debian Wheezy from late April. When I’m hitting the I2C hot and heavy (robot control application) and using the mjpegstreamer for Video using a UVC camera I get this:
[ 4820.747571] Unable to handle kernel NULL pointer dereference at virtual address 1
[ 4820.756039] pgd = c0004000
[ 4820.758865] [00000011] *pgd=00000000
[ 4820.762613] Internal error: Oops: 17 [#1] SMP ARM
[ 4820.767529] Modules linked in: usb_f_acm u_serial usb_f_ecm g_multi usb_f_mass_sc
[ 4820.805144] CPU: 0 PID: 2690 Comm: kworker/0:2 Not tainted 3.14.2-bone2 #1
[ 4820.812353] Workqueue: events cppi_trans_done_work
[ 4820.817364] task: de6c8640 ti: de384000 task.ti: de384000
[ 4820.823008] PC is at rxstate+0x8/0x25c
[ 4820.826926] LR is at cppi41_trans_done+0x3c/0x12c
[ 4820.831843] pc : [] lr : [] psr: 60000093
[ 4820.831843] sp : de385e90 ip : 00000000 fp : 00000009
[ 4820.843843] r10: dfad9c14 r9 : dfad9c00 r8 : de027448
[ 4820.849303] r7 : 000000d4 r6 : de027404 r5 : de01e010 r4 : de027404
[ 4820.856125] r3 : 00000000 r2 : e0878dd0 r1 : ffffffcc r0 : de01e010
[ 4820.862948] Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel
[ 4820.870679] Control: 10c5387d Table: 9d7c4019 DAC: 00000015
[ 4820.876683] Process kworker/0:2 (pid: 2690, stack limit = 0xde384248)
[ 4820.883415] Stack: (0xde385e90 to 0xde386000)
[ 4820.887969] 5e80: de01e010 ffffffcc e0878dd04
[ 4820.896521] 5ea0: de01e010 de027404 de01edb0 de027448 dfad9c14 c053e2f4 c0ab2e044
[ 4820.905072] 5ec0: 00000001 dfad9298 c0aa9080 de384000 dfad9c00 20000013 de01e0104
[ 4820.913624] 5ee0: de01edb0 de027448 dfad9c14 c053e440 c053e3e4 de49f480 dfad9c000
[ 4820.922176] 5f00: 00000000 c0051e7c de49f480 dfad9c00 de384000 00000000 dfad9c000
[ 4820.930727] 5f20: dfad9c00 de384000 c0b3fa29 de49f498 dfad9c00 dfad9c14 000000098
[ 4820.939278] 5f40: 00000000 dd461f00 00000000 de49f480 c00522e0 00000000 000000000
[ 4820.947829] 5f60: 00000000 c0057928 00000000 00000000 000000f8 de49f480 000000000
[ 4820.956380] 5f80: de385f80 de385f80 00000000 00000000 de385f90 de385f90 de385fac0
[ 4820.964930] 5fa0: c0057860 00000000 00000000 c000db78 00000000 00000000 000000000
[ 4820.973480] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 000000000
[ 4820.982030] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 000000000
[ 4820.990593] [] (rxstate) from [] (cppi41_trans_done+0x3c/0x1)
[ 4820.998602] [] (cppi41_trans_done) from [] (cppi_trans_done_)
[ 4821.007709] [] (cppi_trans_done_work) from [] (process_one_w)
[ 4821.016900] [] (process_one_work) from [] (worker_thread+0x2)
[ 4821.025455] [] (worker_thread) from [] (kthread+0xc8/0xdc)
[ 4821.033016] [] (kthread) from [] (ret_from_fork+0x14/0x3c)
[ 4821.040571] Code: e1a00004 e8bd81f0 e92d45f7 e3a070d4 (e5d13045)
[ 4821.046944] —[ end trace 1d9fff7a88319cef ]—
and the BBB is dead. Anyone see anything similar?
TIA,
Mike