Hi Wayne, On 4/4/2019 10:27 PM, Wayne Piekarski wrote: > Hi everyone, > > I have three USB H.264 cameras connected to an ODroid-C2 running a > latest Armbian nightly build, with what appears to be kernel 5.0.5. > > When trying to access these cameras via V4L, I immediately get a kernel > oops and the device reboots. > > It appears as though the problem occurs in > dwc2_unmap_urb_for_dma+0x1c/0x28 which is in drivers/usb/dwc2. > > I'm not a kernel developer so not sure what other information I can > provide apart from the oops dump. I can provide other information if needed. > Could you please provide register dump (debugfs: regdump) before start playing and provide verbose debug log after start playing till oops. Which is speed of your camera? Did you connected directly to root hub? Thanks, Minas > thanks! > > [ 204.624452] Internal error: Oops: 9600004f [#1] PREEMPT SMP > [ 204.635515] Modules linked in: snd_soc_hdmi_codec dw_hdmi_i2s_audio > dw_hdmi_cec meson_vdec uvcvideo videobuf2_dma_contig videobuf2_vmalloc > v4l2_mem2mem videobuf2_memops lz4hc videobuf2_v4l2 lz4hc_compress ao_cec > videobuf2_common meson_dw_hdmi meson_rng meson_ir dw_hdmi meson_drm > rng_core rc_core videodev drm_kms_helper cec snd_soc_meson_aiu_spdif > snd_soc_meson_aiu_i2s drm media meson_canvas snd_soc_meson_audio_core > meson_gxbb_wdt drm_panel_orientation_quirks zram snd_usb_audio > snd_soc_simple_card snd_hwdep snd_usbmidi_lib snd_soc_simple_card_utils > snd_soc_core snd_rawmidi snd_seq_device snd_pcm_dmaengine snd_pcm > snd_timer snd scpi_hwmon soundcore ip_tables x_tables realtek > [ 204.728202] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G W > 5.0.5-meson64 #5.77.190401 > [ 204.745037] Hardware name: Hardkernel ODROID-C2 (DT) > [ 204.758748] pstate: 80000005 (Nzcv daif -PAN -UAO) > [ 204.772475] pc : __memcpy+0xa0/0x180 > [ 204.786168] lr : dwc2_free_dma_aligned_buffer+0x78/0x80 > [ 204.799988] sp : ffff000010013da0 > [ 204.813726] x29: ffff000010013da0 x28: 0000000000000000 > [ 204.827504] x27: 0000000000000038 x26: ffff000010e960c0 > [ 204.841198] x25: 0000000000000101 x24: 0000000000000020 > [ 204.854820] x23: ffff000010e9d000 x22: ffff80006b378594 > [ 204.868394] x21: 0000000000000000 x20: ffff80006a124f79 > [ 204.881902] x19: ffff80007e6f1800 x18: 000000000098090c > [ 204.895494] x17: 0000000000000000 x16: 0000000000000000 > [ 204.909050] x15: 000000000000014d x14: 0000000000000400 > [ 204.922531] x13: 0000000000000000 x12: 0000000000000001 > [ 204.935862] x11: 000000000047f7f9 x10: 0000000000000040 > [ 204.948999] x9 : 0000000000000002 x8 : ffff000010eb82a0 > [ 204.962085] x7 : 0000000000000002 x6 : ffff80006a124f79 > [ 204.975122] x5 : 0000000000000000 x4 : 0000000000800200 > [ 204.988041] x3 : 00000000000001f4 x2 : 0000000000000002 > [ 205.000822] x1 : ffff80007edbf202 x0 : ffff80006a124f79 > [ 205.013627] Process swapper/2 (pid: 0, stack limit = 0x0000000035e14788) > [ 205.027581] Call trace: > [ 205.040442] __memcpy+0xa0/0x180 > [ 205.053332] dwc2_unmap_urb_for_dma+0x1c/0x28 > [ 205.066319] unmap_urb_for_dma+0x18/0x28 > [ 205.079213] __usb_hcd_giveback_urb+0x38/0xe0 > [ 205.092009] usb_giveback_urb_bh+0xac/0x108 > [ 205.104753] tasklet_action_common.isra.2+0x7c/0x168 > [ 205.117479] tasklet_action+0x24/0x30 > [ 205.130030] __do_softirq+0x10c/0x220 > [ 205.142521] irq_exit+0xac/0xc0 > [ 205.154950] __handle_domain_irq+0x60/0xb0 > [ 205.167376] gic_handle_irq+0x58/0xa8 > [ 205.179784] el1_irq+0xb0/0x128 > [ 205.192121] arch_cpu_idle+0x10/0x18 > [ 205.204478] do_idle+0x1dc/0x2a0 > [ 205.216787] cpu_startup_entry+0x24/0x28 > [ 205.229051] secondary_start_kernel+0x19c/0x1d8 > [ 205.241263] Code: b8404423 b80044c3 36080062 78402423 (780024c3) > [ 205.253985] ---[ end trace 156b59abcb22f143 ]--- > [ 205.266298] Kernel panic - not syncing: Fatal exception in interrupt > [ 205.279479] SMP: stopping secondary CPUs > [ 205.291947] Kernel Offset: disabled > [ 205.304384] CPU features: 0x002,24002004 > [ 205.316867] Memory Limit: none > [ 205.329314] Rebooting in 10 seconds.. > >
