CD-RW ide-scsi lost interrupts on 2.4.2 w/ VIA vt82c686b

From: Quim K Holland (qkholland@my-deja.com)
Date: Mon Feb 26 2001 - 16:23:57 EST


('binary' encoding is not supported, stored as-is) I have a Plextor CD-RW connected as slave at ide1 and have
append="hdd=ide-scsi" in lilo.conf. Motherboard is AOpen
AK73-PRO which has VIA vt82c686b onboard.

On recent kernels, cdrecord (1.9) started to barf when trying to
write (both with and without --dummy). The system reports irq
timeouts for /dev/hdd. Reading data from /dev/scd0 (11,0) works
as expected. I would appreciate it if somebody can fix this.

The kernel is compiled with the following enabled.

    CONFIG_BLK_DEV_IDESCSI=y
    CONFIG_IDEDMA_PCI_AUTO=y
    CONFIG_BLK_DEV_IDEDMA=y
    CONFIG_BLK_DEV_VIA82CXXX=y
    CONFIG_IDEDMA_AUTO=y
    CONFIG_SCSI=y
    CONFIG_BLK_DEV_SR=y
    CONFIG_BLK_DEV_SR_VENDOR=y
    CONFIG_SR_EXTRA_DEVS=1
    CONFIG_CHR_DEV_SG=y

Here are the lines from syslog when this problem occured.

    Feb 24 13:20:31 linux kernel: scsi : aborting command due to timeout : pid 0, scsi0, channel 0, id 0, lun 0 0x00 00 00 00 00 00
    Feb 24 13:20:31 linux kernel: hdd: lost interrupt
    Feb 24 13:20:52 linux kernel: scsi : aborting command due to timeout : pid 0, scsi0, channel 0, id 0, lun 0 0x01 00 00 00 00 00
    Feb 24 13:20:52 linux kernel: hdd: irq timeout: status=0xd0 { Busy }
    Feb 24 13:20:52 linux kernel: hdd: ATAPI reset complete
    Feb 24 13:20:52 linux kernel: hdd: irq timeout: status=0x80 { Busy }
    Feb 24 13:20:52 linux kernel: hdd: ATAPI reset complete
    Feb 24 13:20:53 linux kernel: hdd: irq timeout: status=0x80 { Busy }
    Feb 24 13:20:53 linux kernel: hdc: status timeout: status=0x80 { Busy }
    Feb 24 13:20:53 linux kernel: hdc: drive not ready for command
    Feb 24 13:20:53 linux kernel: ide1: reset: success
    Feb 24 13:21:13 linux kernel: scsi : aborting command due to timeout : pid 0, scsi0, channel 0, id 0, lun 0 0x00 00 00 00 00 00
    Feb 24 13:21:13 linux kernel: hdd: lost interrupt

Here is what hdparm -i /dev/hdd reports:

    /dev/hdd:

     Model=PLEXTOR CD-R PX-W8432T, FwRev=1.05, SerialNo=
     Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
     RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
     BuffType=unknown, BuffSize=0kB, MaxMultSect=0
     (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
     IORDY=on/off, tPIO={min:180,w/IORDY:120}, tDMA={min:120,rec:120}
     PIO modes: pio0 pio1 pio2 pio3 pio4
     DMA modes: sdma0 sdma1 sdma2 mdma0 mdma1 *mdma2

And the following is from /proc/ide/via (before lost-interrupts
disables DMA for /dev/hdd). For /dev/hda and /dev/hdc (they are
hard disks), hdparm -d0 is run at the system startup time to
disable UDMA (I have 80-wire UDMA-100 cable on these channels,
but previously lost a lot of data without CRC errors, so am
being paranoid to do this for now).

    ----------VIA BusMastering IDE Configuration----------------
    Driver Version: 3.20
    South Bridge: VIA vt82c686b
    Revision: ISA 0x40 IDE 0x6
    BM-DMA base: 0xc000
    PCI clock: 33MHz
    Master Read Cycle IRDY: 0ws
    Master Write Cycle IRDY: 0ws
    BM IDE Status Register Read Retry: yes
    Max DRDY Pulse Width: No limit
    -----------------------Primary IDE-------Secondary IDE------
    Read DMA FIFO flush: yes yes
    End Sector FIFO flush: no no
    Prefetch Buffer: yes yes
    Post Write Buffer: yes no
    Enabled: yes yes
    Simplex only: no no
    Cable Type: 80w 80w
    -------------------drive0----drive1----drive2----drive3-----
    Transfer Mode: PIO PIO PIO UDMA
    Address Setup: 30ns 120ns 30ns 30ns
    Cmd Active: 90ns 90ns 90ns 90ns
    Cmd Recovery: 30ns 30ns 30ns 30ns
    Data Active: 90ns 330ns 90ns 90ns
    Data Recovery: 30ns 270ns 30ns 30ns
    Cycle Time: 60ns 50ns 60ns 90ns
    Transfer Rate: 33.3MB/s 40.0MB/s 33.3MB/s 22.2MB/s

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This archive was generated by hypermail 2b29 : Wed Feb 28 2001 - 21:00:12 EST