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Bug#352972: linux-image-2.6.15-1-686: fail to use udma with intel

Same problem here with linux-image 2.6.15-6. Performance is quite horrible
without my usual UDMA ide settings. Launching bonnie++ means a 10.0+ load !

# hdparm -d 1 /dev/hda
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted
 using_dma    =  0 (off)

# uname -a
Linux mercury 2.6.15-1-686 #1 Fri Feb 10 15:49:07 UTC 2006 i686 GNU/Linux

linux-image package installed:
- linux-image-2.6-686      2.6.15-6
- linux-image-2.6.15-1-686 2.6.15-6

Below is part of the dmesg log (uptime: 3 days).
It seems ICH4 come too late in the boot process.
No disk-related module is listed in /etc/modules.

Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
Probing IDE interface ide0...
hda: ST360015A, ATA DISK drive
Probing IDE interface ide1...
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: max request size: 128KiB
hda: 117231408 sectors (60022 MB) w/2048KiB Cache, CHS=65535/16/63
hda: cache flushes supported
 hda: hda1 hda2 hda3 < hda5 hda6 hda7 >
shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
ICH4: IDE controller at PCI slot 0000:00:1f.1
ACPI: PCI Interrupt 0000:00:1f.1[A] -> GSI 18 (level, low) -> IRQ 193
ICH4: chipset revision 1
ICH4: not 100% native mode: will probe irqs later
ICH4: port 0x01f0 already claimed by ide0
ICH4: port 0x0170 already claimed by ide1
ICH4: neither IDE port enabled (BIOS)

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