Messages in this thread Patch in this message | | | Date | Sun, 8 Nov 2009 13:07:40 GMT | From | tip-bot for Tejun Heo <> | Subject | [tip:core/iommu] x86: Fix iommu=nodac parameter handling |
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Commit-ID: 2ae8bb75db1f3de422eb5898f2a063c46c36dba8 Gitweb: http://git.kernel.org/tip/2ae8bb75db1f3de422eb5898f2a063c46c36dba8 Author: Tejun Heo <tj@kernel.org> AuthorDate: Mon, 26 Oct 2009 15:41:46 +0100 Committer: Ingo Molnar <mingo@elte.hu> CommitDate: Sun, 8 Nov 2009 13:19:05 +0100
x86: Fix iommu=nodac parameter handling
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> Cc: <stable@kernel.org> # .32.x and older LKML-Reference: <4AE5B52A.4050408@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> --- 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 ce2fb91..839d49a 100644 --- a/arch/x86/kernel/pci-dma.c +++ b/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;
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