diff --git a/[refs] b/[refs]
index 6e3c390c2374..ef4850c62992 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 338bac527ed0e35b4cb50390972f15d3cbce92ca
+refs/heads/master: 2ae8bb75db1f3de422eb5898f2a063c46c36dba8
diff --git a/trunk/arch/x86/kernel/pci-dma.c b/trunk/arch/x86/kernel/pci-dma.c
index ce2fb91bbed1..839d49a669bc 100644
--- a/trunk/arch/x86/kernel/pci-dma.c
+++ b/trunk/arch/x86/kernel/pci-dma.c
@@ -216,7 +216,7 @@ 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;