While playing around with cameras (as I do...) I am finding that I am hitting some faults on the USB2 stack on Salvator-XS (H3) Test: Connect USB 2.0 web cam (UVC) (appears as /dev/video23) gst-launch-1.0 v4l2src device=/dev/video23 '!' image/jpeg, width=640, height=480 '!' progressreport '!' rtpjpegpay '!' udpsink host=192.168.0.20 port=5000 Result: Almost immediately, and quite repeatably the following page fault - but only on the USB2 ports: A USB3 camera works fine on the USB3 port, and the USB2 camera works fine in the USB3 port. -- Kieran [ 78.297440] Unable to handle kernel paging request at virtual address ffffc006fc37bcac [ 78.305478] Mem abort info: [ 78.308284] ESR = 0x96000004 [ 78.311352] Exception class = DABT (current EL), IL = 32 bits [ 78.317296] SET = 0, FnV = 0 [ 78.320362] EA = 0, S1PTW = 0 [ 78.323515] Data abort info: [ 78.326407] ISV = 0, ISS = 0x00000004 [ 78.330258] CM = 0, WnR = 0 [ 78.333240] swapper pgtable: 4k pages, 48-bit VAs, pgdp = 00000000edff4481 [ 78.340143] [ffffc006fc37bcac] pgd=0000000000000000 [ 78.345111] Internal error: Oops: 96000004 [#1] PREEMPT SMP [ 78.350701] Modules linked in: [ 78.353771] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.16.0-rc7-arm64-renesas #484 [ 78.361450] Hardware name: Renesas Salvator-X 2nd version board based on r8a7795 ES2.0+ (DT) [ 78.369914] pstate: 40000085 (nZcv daIf -PAN -UAO) [ 78.374730] pc : ehci_work.part.34+0x640/0x8e8 [ 78.379186] lr : ehci_work.part.34+0x71c/0x8e8 [ 78.383640] sp : ffff000008003d20 [ 78.386963] x29: ffff000008003d20 x28: ffff8006fa97f580 [ 78.392294] x27: ffff00000a0050c0 x26: 0000000000000080 [ 78.397626] x25: 00000000000000f3 x24: 00000000000000f6 [ 78.402957] x23: ffff8006f92734c8 x22: ffff8006f9242798 [ 78.408288] x21: 0000000000000000 x20: ffff8006f9273330 [ 78.413619] x19: 0000000000000000 x18: 0000000000000500 [ 78.418950] x17: 00000000000076e8 x16: 00000000000076e7 [ 78.424281] x15: ffff0000098f7ac8 x14: 00000000000076e8 [ 78.429612] x13: 0000000000000001 x12: 00000000000076ea [ 78.434943] x11: 00000000ffffffb9 x10: 00000000ffffffb5 [ 78.440274] x9 : 00000000ffffffba x8 : 00000000ffffffc1 [ 78.445605] x7 : 0000000000000005 x6 : 0000000096383fc8 [ 78.450935] x5 : ffff00000a0050e4 x4 : 0000000086411f40 [ 78.456266] x3 : ffff000009cf53cc x2 : 0000000000000005 [ 78.461597] x1 : ffffc006fc37bc00 x0 : ffff00000a0050c4 [ 78.466929] Process swapper/0 (pid: 0, stack limit = 0x00000000e653c8e9) [ 78.473648] Call trace: [ 78.476101] ehci_work.part.34+0x640/0x8e8 [ 78.480208] ehci_irq+0x2d4/0x320 [ 78.483535] usb_hcd_irq+0x3c/0x60 [ 78.486951] __handle_irq_event_percpu+0x98/0x468 [ 78.491667] handle_irq_event_percpu+0x28/0x60 [ 78.496123] handle_irq_event+0x50/0x80 [ 78.499969] handle_fasteoi_irq+0xa8/0x188 [ 78.504077] generic_handle_irq+0x34/0x50 [ 78.508097] __handle_domain_irq+0x68/0xc0 [ 78.512206] gic_handle_irq+0x60/0xb8 [ 78.515878] el1_irq+0xb4/0x130 [ 78.519028] arch_cpu_idle+0x34/0x228 [ 78.522705] default_idle_call+0x20/0x38 [ 78.526640] do_idle+0x16c/0x1e8 [ 78.529876] cpu_startup_entry+0x2c/0x30 [ 78.533809] rest_init+0x258/0x268 [ 78.537223] start_kernel+0x3b0/0x3c4 [ 78.540897] Code: b9408c22 0b040044 b9008c24 17ffff31 (b940ac22) [ 78.547023] ---[ end trace cdaffda78bbfd46e ]--- [ 78.551653] Kernel panic - not syncing: Fatal exception in interrupt [ 78.558031] SMP: stopping secondary CPUs [ 78.561969] Kernel Offset: disabled [ 78.565468] CPU features: 0x01802000 [ 78.569051] Memory Limit: none [ 78.572125] ---[ end Kernel panic - not syncing: Fatal exception in interrupt
