Re: [Bug 13286] New: dma_timer_expiry: DMA status (0x21)

[Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>]

On Tuesday 12 May 2009 08:35:53 bugzilla-daemon@bugzilla.kernel.org wrote:
> http://bugzilla.kernel.org/show_bug.cgi?id=13286
> 
>            Summary: dma_timer_expiry: DMA status (0x21)
>            Product: IO/Storage
>            Version: 2.5
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: IDE
>         AssignedTo: io_ide@kernel-bugs.osdl.org
>         ReportedBy: fibre_optic@go2.pl
>         Regression: No
> 
> 
> Hello,
> 
> I have Dell Optiplex with ide->CF-Flash card interface. This configuration
> works well with 2.6.27.21 but it generates the following messages on 2.6.29.3:
> ...
> hda: dma_timer_expiry: DMA status (0x21)
> hda: DMA timeout error
> ...
> 
> Here you have more data, if you need something more please let me know.
> 
> PS
> 
> This issue takes place with 2.6.28 too.

Does 2.6.27.21 use DMA?

Is this system equipped with on-board IDE->CF adapter,
or is it an add-on one?

Does this adapter support DMA at the hardware level
(some adapters don't have DMA lines)?

Thanks.