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| author | Tejun Heo <tj@kernel.org> | 2009-10-26 15:41:46 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-12-18 13:30:56 -0800 |
| commit | 55de2daba843d0884557063003e7bb90525c0dc1 (patch) | |
| tree | 98575776f378deca5893fb6d3ddec8842acb833b /arch | |
| parent | 73c22292dd7a0742761dc60a6bff6e8b363d90df (diff) | |
| download | lwn-55de2daba843d0884557063003e7bb90525c0dc1.tar.gz lwn-55de2daba843d0884557063003e7bb90525c0dc1.zip | |
x86: Fix iommu=nodac parameter handling
commit 2ae8bb75db1f3de422eb5898f2a063c46c36dba8 upstream.
iommu=nodac should forbid dac instead of enabling it. Fix it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Matteo Frigo <athena@fftw.org>
LKML-Reference: <4AE5B52A.4050408@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/pci-dma.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c index 87d4d6964ec2..4b85cbad3434 100644 --- a/arch/x86/kernel/pci-dma.c +++ b/arch/x86/kernel/pci-dma.c @@ -175,7 +175,7 @@ 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; |