Re: [PATCH] sata_nv: fix ATAPI issues with memory over 4GB (v7)

[Jeff Garzik]

Robert Hancock wrote:
> This fixes some problems with ATAPI devices on nForce4 controllers in ADMA mode
> on systems with memory located above 4GB. We need to delay setting the 64-bit
> DMA mask until the PRD table and padding buffer are allocated so that they don't
> get allocated above 4GB and break legacy mode (which is needed for ATAPI
> devices). Also, if either port is in ATAPI mode we need to set the DMA mask
> for the PCI device to 32-bit to ensure that the IOMMU code properly bounces
> requests above 4GB, as it appears setting the bounce limit does not guarantee
> that we will not try to map requests above this point.
>
> Reported to fix https://bugzilla.redhat.com/show_bug.cgi?id=351451
>
> Signed-off-by: Robert Hancock <hancockr@xxxxxxx>

applied, though it can still be improved...  let's see if this sticks.


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