Promise 20267 hangs with 2.4.19-pre3 and 2.4.19-pre3-ac3

From: Andrew Burgess (aab@cichlid.com)
Date: Tue Mar 19 2002 - 17:03:22 EST

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With 2.4.18 everything works fine:

  Mar 13 13:56:13 athlon kernel: PDC20267: IDE controller on PCI bus 00 dev 48
  Mar 13 13:56:13 athlon kernel: PDC20267: chipset revision 2
  Mar 13 13:56:13 athlon kernel: PDC20267: not 100%% native mode: will probe irqs later
  Mar 13 13:56:13 athlon kernel: PDC20267: (U)DMA Burst Bit ENABLED Primary PCI Mode Secondary PCI Mode.
  Mar 13 13:56:13 athlon kernel: ide2: BM-DMA at 0x1800-0x1807, BIOS settings: hde:pio, hdf:pio
  Mar 13 13:56:13 athlon kernel: ide3: BM-DMA at 0x1808-0x180f, BIOS settings: hdg:pio, hdh:pio

  Mar 13 13:56:13 athlon kernel: hde: Maxtor 4G120J6, ATA DISK drive
  Mar 13 13:56:13 athlon kernel: hdf: Maxtor 4G160J8, ATA DISK drive
  Mar 13 13:56:13 athlon kernel: hdg: TOSHIBA CD-ROM XM-6602B, ATAPI CD/DVD-ROM drive

Mar 13 13:56:14 athlon kernel: hde: 240121728 sectors (122942 MB) w/2048KiB Cache, CHS=238216/16/63, UDMA(100)
Mar 13 13:56:14 athlon kernel: hdf: 268435455 sectors (137439 MB) w/2048KiB Cache, CHS=266305/16/63, UDMA(100)

  Mar 13 13:56:14 athlon kernel: Partition check:
  Mar 13 13:56:14 athlon kernel: hde: hde1 hde2 hde3 hde4
  Mar 13 13:56:14 athlon kernel: hdf: hdf1

With 2.4.19-pre3 and pre3-ac3 the disk type and size are reported correctly
but the systems hangs at the partition check (I couldn't find a copy of the log on
the disk so I edited the above to match what I remembered on the screen):

  Mar 13 13:56:13 athlon kernel: hde: Maxtor 4G120J6, ATA DISK drive
  Mar 13 13:56:14 athlon kernel: hde: 240121728 sectors (122942 MB) w/2048KiB Cache, CHS=238216/16/63, UDMA(100)
  Mar 13 13:56:14 athlon kernel: Partition check:
  Mar 13 13:56:14 athlon kernel: hde:

I tried the experiental ide timeout workaround and that does print a timeout message
after a few seconds but the system still hangs there.

Its a Tyan 2462 athlon SMP with real SMP CPUs. There is another disk and a cdrom on
this controller but due to cable lengths I can't switch things around.

I am willing to try any patch or suggestion...

Andrew

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