crash when using dma for cdrom drive

From: Mathieu Allard (mathieu_at_opalescent.ca)
Date: 01/30/04

  • Next message: Zephaniah E. Hull: "Re: 2.6.2-rc2-mm1" 
    To: linux-kernel@vger.kernel.org
Date:	Fri, 30 Jan 2004 04:43:39 -0600

    I have an MSIDDR motherboard, model k7t266 pro2 ver. 2.0.

    When I enable dma for my cdrom drive using hdparm /dev/hdc, dma is turned on.

    However, when I try and access the drive, my computer crashes.

    In a console this is the text that I see :

    dma timeout error : status=0x50 {Drive Ready SeekComplete}
    ide-scsi : abort called for 1629
    bad : scheduling while atomic !
    call trace :
    ******( a whole bunch of information is here)

    and then something like hdc dma reset complete.

    I have tested this with a different cdrom drive and a different ide cable and
    the same thing happens.
    The cdrom is the only device on the ide chain.

    I am running a vanilla linux kernel 2.6.1 and am using the via chipset driver.
    Debian unstable is my distribution.

    I have searched google to no avail.

    I have looked at various bios options but none seem interesting.

    Any help would be appreciated with this problem.

    Thanks in advance.

    Mathieu
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