> fwnode0 at fwohci0 Node 0: UID 00:01:d2:00:e0:13:0d:31
> atabibus0: at atabus0: 2 targets
> cd0 at atapibus0 drive 0:<PHOLIPS DVD+RW SDVD6004, , 1.03> cdrom removable
                            ^^^^^^^

looks like transmission errors..

> fwnode0: Link Speed: 100Mb/s, max_rec:64 bytes
> uvm_fault(0xc0849ec0,0x6010000,0,2) -> 0xe
> kernel: page fault trap, code=0
> Stopped in pud 7.1 (fwohci0) at netbsd:sbp2_abort+0x49:   movl
> %ebx,0xec(%edx)
> db>
>
> db> tr
> -------
> sbp2_abort(...) at netbsd:sbp2_abort+0x49
> sbp2_free(...) at netbsd:sbp2_free+0x3c
> sbpscsi_match(...) at netbsd:sbpscsi_match+0x5c
> mapply(...) at netbsd:mapply+0x36
> config_search(...) at netbsd:config_search+0x8c
> config_found_sm(...) at netbsd:config_found_sm+0x1c
> p1212_match_units(...) at netbsd:p1212_match_units+0x4e
> fwnode_configrom_input(...) at netbsd:fwnode_configrom_input+0x1e7
> fwohci_read_multi_resp(...) at netbsd:fwohci_read_multi_resp+0x170
> fwohci_arrs_input(...) at netbsd:fwohci_arrs_input+0x79
> fwohci_event_thread(...) at netbsd:fwohci_event_thread+0x263
> fwohci_thread_init(...) at netbsd:fwohci_thread_init+0x1dc
> db>
>   (comment: (...) --> figures omitted)
> --------------------------------------
>
> Kernel built with config file: GENERIC:
> ----------------------------------------------------------
> ...
>
> # PCI IEEE1394 controllers
> fwohci* at pci? dev ? function ?    # IEEE1394 Open Host Controller
>
> # CardBus IEEE1394 controllers
> fwohci* at cardbus? dev ? function ?    # IEEE1394 Open Host Controller
>
> #fw*    at fwbus?            # IP over 1394
>
> # IEEE1394 nodes
> fwnode* at fwbus? idhi ? idlo ?
> sbpscsi* at fwnode?
> scsibus* at sbpscsi?
> ...
> -------------------------------------------------------------
>
> (My system is a DELL notebook Inspiron 5150 / CPU P4M-3.06GHz / Mem-2GB)
> ------------------
>
> Maybe someone of the kernel experts can have a look at this and maybe
> have an answer/solution :-)
>
> Thanks and regards. / Hilmar.
>