Commit 2ae8bb75 authored Oct 26, 2009 by Tejun Heo Committed by Ingo Molnar Nov 08, 2009

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>

parent 338bac52

arch/x86/kernel/pci-dma.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;