[POWERPC] Use it_offset not pte_offset in cell IOMMU code

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The cell IOMMU tce build and free routines use pte_offset to convert
the index passed from the generic IOMMU code into a page table offset.

This takes into account the SPIDER_DMA_OFFSET which sets the top bit
of every DMA address.

However it doesn't cater for the IOMMU window starting at a non-zero
address, as the base of the window is not incorporated into pte_offset
at all.

As it turns out tbl->it_offset already contains the value we need, it
takes into account the base of the window and also pte_offset. So use
it instead!

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

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Michael Ellerman 2008-02-29 18:33:23 +11:00 • committed by Arnd Bergmann

parent f9660e8a6c

commit 0d7386ebff

1 changed files with 2 additions and 2 deletions

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arch/powerpc/platforms/cell/iommu.c

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