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    Subject2.3.47: hard freeze reading scsi cdrom on ncr53c810
    Date
    I have an SMP pentium system, SCSI cdrom on ncr53c810 adapter.
    Playing files residing on cdrom with xmms (multithreaded graphical
    mp3 player) gives me reproducable hard system freeze. It happens
    when new file is opened, not every time but almost so. If I
    manage to switch from X screen to text console before this happens,
    I see this on the screen:

    Code: 0f 0b 83 c4 0c f0 0f ba 2e 00 0f 82 89 bc 0c 00 83 fd 12 74
    Aiee, killing interrupt handler

    before that, there is a full screen of [<addresses>], not scrollable
    (keyboard driver does not work, neither SysRq nor scroll or switch VT).
    Addresses from bottom up are in these functions according to System.map:

    c010a428: system_call (two bytes before ret_from_sys_call)
    c013941d: sys_read
    c015d7e8: proc_file_read
    c015f5cf: meminfo_read_proc
    c0136349: si_swapinfo
    c010a500: ret_from_intr (exect address)
    c010c3e4: do_IRQ
    c010c078: handle_irq_event
    c019f888: ncr_53c8xx_intr
    c019250b: scsi_old_done
    c0192c1b: update_timeout
    c0198c98: rw_intr
    c019350f: scsi_io_completion
    c019330e: __scsi_end_request
    c018c7b3: scsi_release_command
    c01930b5: scsi_queue_next_request
    c0193931: scsi_request_fn
    c018ccdc: scsi_init_cmd_from_req
    c010a57d: error_code
    c019b400: ncr_queue_command
    c019b400: ncr_queue_command (sic!)
    c019b481: ncr_start_next_ccb
    c020d787: RCSid (with "r" tag. Before goes "R scsi_device_types")
    c4802014: (outside the address range)
    c019b56f: ncr_put_start_queue
    c010a57d: error_code
    et cetera...

    Eugene

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