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From: Santiago Garcia Mantinan <>
Subject: IDE DMA setting not available on 2.4.23 as a module
Date: Sun, 30 Nov 2003 20:58:15 +0100	[thread overview]
Message-ID: <> (raw)


Yesterday I started to upgrade my systems to 2.4.23, some of them were
already running pre or rc versions, but when I tried my Pentium MMX wich
boots out of SCSI and on which I like to have IDE driver as a module, I
found that the DMA setting was not working, hdparm was saying:

 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted

So I changed the driver option to set DMA by default to ON, but nothing
changed, still the same problem, then I tried to compile the IDE driver into
the kernel instead of having it as a module and then the dma support started
to work, either having the driver enable it by default or by setting it with

The motherboard uses a 430TX chipset, thus with a PIIX4 IDE controller.

Is this a bug or is this a known and accepted limitation of having the IDE
driver as a module?

If you want me to test any patch to see if we can fix this, or need any more
info, don't hesitate to contact me.

Manty/BestiaTester ->

             reply	other threads:[~2003-11-30 19:58 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-11-30 19:58 Santiago Garcia Mantinan [this message]
2003-11-30 20:15 ` IDE DMA setting not available on 2.4.23 as a module Bartlomiej Zolnierkiewicz
2003-11-30 22:42   ` Santiago Garcia Mantinan
2003-11-30 22:47     ` Bartlomiej Zolnierkiewicz
2003-11-30 23:16       ` Santiago Garcia Mantinan

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