Re: How to Force PIO mode on sata promise (Linux 2.6.10)

[Chris Wedgwood]

On Thu, Sep 22, 2005 at 10:03:10AM +0200, David Sanchez wrote:

> I add my card into the dma_black_list of the libata to force DMA
> disabled and the problem seems to no more appear...maybe PIO is so
> slow that the data has no time to be corrupted...  But I can NOT
> affirm that the problem is the DMA.

> I try the linux kernel 2.4,2.6.11, 2.6.12 and 2.6.13. More I try 2
> different toolchains and the problem persists...

I doubt any of those will help.  It sounds like a driver bug wrt to
non-coherent PCI.  Presumably this will also hit sparc people if they
use this hardware and some PPC too.

Does the driver use the *dma_sync* API(s)?  You might want to read
over Documentation/DMA-API.txt and see if the driver is doing the
right things.
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