From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Date: Thu, 2 Dec 2010 16:04:29 +0000 (-0500)
Subject: radeon/ttm/PCIe: Use dma_addr if TTM has set it.
X-Git-Tag: v2.6.39-rc1~458^2~23^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c39d35161e87f1d7c0628af6907ac66a8c77f63f;p=pandora-kernel.git

radeon/ttm/PCIe: Use dma_addr if TTM has set it.

If the TTM layer has used the DMA API to setup pages that are
TTM_PAGE_FLAG_DMA32 (look at patch titled: "ttm: Utilize the dma_addr_t
array for pages that are to in DMA32 pool."), lets use it
when programming the GART in the PCIe type cards.

This patch skips doing the pci_map_page (and pci_unmap_page) if
there is a DMA addresses passed in for that page. If the dma_address
is zero (or DMA_ERROR_CODE), then we continue on with our old
behaviour.

[v2: Fixed an indentation problem, added reviewed-by tag]
[v3: Added Acked-by Jerome]

Acked-by: Jerome Glisse <j.glisse@gmail.com>
Reviewed-by: Thomas Hellstrom <thomas@shipmail.org>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Ian Campbell <ian.campbell@citrix.com>
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