tree 2118bef73c46aa505eb54cdbbfe80e0c7ab93738
parent a65d17c9d27a85782cfe1bbc36c747ffa1f81814
author Andi Kleen <ak@suse.de> 1139783699 -0800
committer Linus Torvalds <torvalds@g5.osdl.org> 1139789447 -0800

[PATCH] x86_64: GART DMA merging fix

Don't touch the non DMA members in the sg list in dma_map_sg in the IOMMU

Some drivers (in particular ST) ran into problems because they reused the sg
lists after passing them to pci_map_sg().  The merging procedure in the K8
GART IOMMU corrupted the state.  This patch changes it to only touch the dma*
entries during merging, but not the other fields.  Approach suggested by Dave
Miller.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>