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Date: Tue, 22 Dec 2015 23:21:06 +0100 From: Joerg Roedel <joro@...tes.org> To: iommu@...ts.linux-foundation.org Cc: linux-kernel@...r.kernel.org, joro@...tes.org, jroedel@...e.de Subject: [PATCH 01/23] iommu/amd: Warn only once on unexpected pte value From: Joerg Roedel <jroedel@...e.de> This prevents possible flooding of the kernel log. Signed-off-by: Joerg Roedel <jroedel@...e.de> --- drivers/iommu/amd_iommu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 8b2be1e..3cdfac6 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -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; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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