hdparm and nforce2

[jaroug <jaroug@gmail.com>]

Hi,

I own a motherboard with a nforce2 based chipset. The problem is that I
can't enable dma (debian sid 2.6.15-1-k7) :

# hdparm -c1 -d1 /dev/hda

/dev/hda:
 setting 32-bit IO_support flag to 1
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted
 IO_support   =  1 (32-bit)
 using_dma    =  0 (off)

lspci result :
# lspci |grep -i ide 
0000:00:09.0 IDE interface: nVidia Corporation nForce2 IDE (rev a2)

I think the good module is loaded :
# lsmod |grep amd74x
amd74xx                12892  0 [permanent]
ide_core              112928  5
ide_cd,amd74xx,generic,ide_disk,ide_generic

Just note that dma works with the same hard drive and an other
motherboard.
If anybody have an idea, because it's very slooow :/

jaroug.