diff options
| -rw-r--r-- | drivers/pci/intel-iommu.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index 73a5c71dd37d..ae5ccdf8b19f 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -2442,6 +2442,11 @@ static int iommu_dummy(struct pci_dev *pdev) return pdev->dev.archdata.iommu == DUMMY_DEVICE_DOMAIN_INFO; } +static int iommu_should_identity_map(struct pci_dev *pdev) +{ + return pdev->dma_mask > DMA_BIT_MASK(32); +} + /* Check if the pdev needs to go through non-identity map and unmap process.*/ static int iommu_no_mapping(struct pci_dev *pdev) { @@ -2455,7 +2460,7 @@ static int iommu_no_mapping(struct pci_dev *pdev) found = identity_mapping(pdev); if (found) { - if (pdev->dma_mask > DMA_BIT_MASK(32)) + if (iommu_should_identity_map(pdev)) return 1; else { /* @@ -2472,7 +2477,7 @@ static int iommu_no_mapping(struct pci_dev *pdev) * In case of a detached 64 bit DMA device from vm, the device * is put into si_domain for identity mapping. */ - if (pdev->dma_mask > DMA_BIT_MASK(32)) { + if (iommu_should_identity_map(pdev)) { int ret; ret = domain_add_dev_info(si_domain, pdev); if (ret) |