Tejun Heo wrote:
Robert Hancock wrote:
Tejun Heo wrote:
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).
Signed-off-by: Robert Hancock <hancockr@xxxxxxx>
applied to #tj-upstream-fixes.
I have a report that these patches crashed but the previous patch worked:
https://bugzilla.redhat.com/show_bug.cgi?id=351451
So there may still be a problem here.
Any progress?
It looks like the problem is that even though we set the DMA mask after
we allocate the PRD and pad buffers, when the other port is set up, the
DMA mask is already over 64-bit and so it allocates its buffers over 4GB
and fails. I think we just need to explicitly set to 32-bit first,
getting the reporter to try that one now.
--
Robert Hancock Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@xxxxxxxxxxxxx
Home Page: http://www.roberthancock.com/
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