lost interrupts with 2.4.1-rc6 and i875p chipset

[Greg Norris]

I recently installed Debian on a new i875P chipset machine, and I'm
seeing frequent "hdX: lost interrupt" messages at the console under
2.4.21-rc6.  The IDE system appears to stall for 5 seconds or so
whenever this occurs (I assume that a reset/resync is occurring), but
then seems to recover.  It's pretty easy to reproduce... any
significant disk activity will trigger the problem.  In particular,
running fsck or copying files off a cdrom will expose the problem
within seconds.

This issue does not occur under 2.4.20.  Both kernels were compiled
using gcc 2.95.4, and no non-kernel modules are in use in either case
(no nvidia module, for instance).  I'd be happy to provide additional
information, if someone can point out what would be helpful.

root@glitch[~]# lspci -i ~adric/pci.ids 
00:00.0 Host bridge: Intel Corp. 82875P Memory Controller Hub (rev 02)
00:01.0 PCI bridge: Intel Corp. 82875P Processor to AGP Controller (rev 02)
00:1d.0 USB Controller: Intel Corp. 82801EB USB (rev 02)
00:1d.1 USB Controller: Intel Corp. 82801EB USB (rev 02)
00:1d.2 USB Controller: Intel Corp. 82801EB USB (rev 02)
00:1d.3 USB Controller: Intel Corp. 82801EB USB (rev 02)
00:1d.7 USB Controller: Intel Corp. 82801EB USB2 (rev 02)
00:1e.0 PCI bridge: Intel Corp. 82801BA/CA/DB/EB PCI Bridge (rev c2)
00:1f.0 ISA bridge: Intel Corp. 82801EB LPC Interface Controller (rev 02)
00:1f.1 IDE interface: Intel Corp. 82801EB Ultra ATA Storage Controller (rev 02)
00:1f.2 IDE interface: Intel Corp. 82801EB Ultra ATA Storage Controller (rev 02)
00:1f.3 SMBus: Intel Corp. 82801EB SMBus Controller (rev 02)
01:00.0 VGA compatible controller: nVidia Corporation NV18 [GeForce4 MX 440 AGP 8x] (rev a2)
02:02.0 Multimedia audio controller: Creative Labs [SB Live! Value] EMU10k1X
02:02.1 Input device controller: Creative Labs [SB Live! Value] Input device controller
02:08.0 Ethernet controller: Intel Corp.: Unknown device 1050 (rev 02)