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Subject[PATCH 2.6.29-rc7 1/2] x86: fix iommu=nodac parameter handling
nodac should forbid dac not instead of enabling it.  Fix it.

Signed-off-by: Tejun Heo <tj@kernel.org>
---
arch/x86/kernel/pci-dma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index b254285..69c7a8d 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -197,7 +197,7 @@ static __init int iommu_setup(char *p)
if (!strncmp(p, "allowdac", 8))
forbid_dac = 0;
if (!strncmp(p, "nodac", 5))
- forbid_dac = -1;
+ forbid_dac = 1;
if (!strncmp(p, "usedac", 6)) {
forbid_dac = -1;
return 1;

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