IDE DMA setting not available on 2.4.23 as a module

From: Santiago Garcia Mantinan (lkml_at_manty.net)
Date: 11/30/03

  • Next message: William Lee Irwin III: "Re: Oops with tmpfs on both 2.4.22 & 2.6.0-test11" 
    Date:	Sun, 30 Nov 2003 20:58:15 +0100
To: linux-kernel@vger.kernel.org

    Hi!

    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
    hdparm.

    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.

    Regards... 

    -- 
Manty/BestiaTester -> http://manty.net
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  • Next message: William Lee Irwin III: "Re: Oops with tmpfs on both 2.4.22 & 2.6.0-test11"

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