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[PATCH] x86_64: Fix CONFIG_IOMMU_DEBUG 

If CONFIG_IOMMU_DEBUG is set force_iommu defaults to 1. In the case
where no HW IOMMU is present in the machine and we end up using nommu,
leaving force_iommu set to 1 causes dma_alloc_coherent to do the wrong
thing. Therefore, if we end up using nommu, make sure force_iommu is
0.

Signed-off-by: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Muli Ben-Yehuda 2006-08-02 22:37:31 +02:00 committed by Linus Torvalds
parent 2699500b31
commit a166222cde
1 changed files with 2 additions and 0 deletions
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2
arch/x86_64/kernel/pci-nommu.c
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@ -92,5 +92,7 @@ void __init no_iommu_init(void)
{
if (dma_ops)
return;
force_iommu = 0; /* no HW IOMMU */
dma_ops = &nommu_dma_ops;
}