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    SubjectRe: [BUG] SCSI/aha152x lockup on 2.2.6 while reading faulty cd-rom
    On Sun, 18 Apr 1999, Simon J Mudd wrote:

    > I can reproducibly hang 2.2.6 if reading a faulty cd-rom. I don't expect
    > to be able to read the cd-rom, but I don't think the kernel should lock up
    > completely in this situation. I know this is old hardware, but any help
    > would be appreciated. If more info is needed I'll provide it on request.

    Just tested the same sequence of events using redhat 5.2's "default
    kernel" 2.0.36-0.7, and get the following output on the screen but NO
    lockup.

    scsi0: MEDIUM ERROR on channel 0, id 1, lun 0, CDB: Request Sense 00 00 00 10 00
    Current error sr0b:00: sense key Medium Error
    Additional sense indicates Unrecovered read error
    CD-ROM I/O error: dev 0b:00, sector 885672
    scsi : aborting command due to timeout : pid 1436, scsi0, channel 0, id 1,
    lun 0 Read (6) 03 60 eb 03 00
    aha152x: abort(), SCpnt=0x00fbd018, QUEUE STATUS:
    issue_SC:
    current_SC:
    none
    disconnected_SC:
    0x00fbd018: target=1; lun=0; cmnd=(Read (6) 03 60 eb 03 00
    ); residual=1024; buffers=5; phase |disconnected|send_ident|; in
    other(MESSAGE IN); phaseend; next=0x00000000

    waiting: SCSISEQ (RESELI ); SCSISIG (DATA OUT); INTSTAT (lo); SSTAT
    (BUSFREE PHASECHG ); SSTAT (); SXFRCTL0 (CH1 ); SIGNAL (); SELID (84),
    SSTAT2 (SEMPTY ); SFCNT (0); SCSICNT (0), OFFCNT(0), SSTAT4 (); DMACNTRL0
    (16BIT PIO WRITE INTEN ); DMASTAT (WORDRDY DFIFOEMP )
    enabled interrupts (ENSELDI )
    (ABORT) target selected, CD-ROM I/O error: dev 0b:00, sector 885676
    CD-ROM I/O error: dev 0b:00, sector 885688
    CD-ROM I/O error: dev 0b:00, sector 885672
    cat: /mnt/cdrom/images/boot.img: Input/output error
    [root@phoenix /root]#

    I don't know if this information is sufficient to find the bug.

    Let me know if I can provide more information.

    Simon
    --
    Simon J Mudd, Madrid SPAIN Tel: +34-91-408 4878 email: sjmudd@bitmailer.net
    [short messages - from radio hams only] ----> ea4els@ea4els.ampr.org


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