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iommu/amd: Warn only once on unexpected pte value

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This prevents possible flooding of the kernel log.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2015-12-21 12:50:54 +01:00
parent 759ce23b62
commit a7fb668fd8
1 changed files with 2 additions and 2 deletions
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4
drivers/iommu/amd_iommu.c
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@ -2328,7 +2328,7 @@ static dma_addr_t dma_ops_domain_map(struct dma_ops_domain *dom,
else if (direction == DMA_BIDIRECTIONAL)
__pte |= IOMMU_PTE_IR | IOMMU_PTE_IW;
WARN_ON(*pte);
WARN_ON_ONCE(*pte);
*pte = __pte;
@ -2357,7 +2357,7 @@ static void dma_ops_domain_unmap(struct dma_ops_domain *dom,
pte += PM_LEVEL_INDEX(0, address);
WARN_ON(!*pte);
WARN_ON_ONCE(!*pte);
*pte = 0ULL;
}