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authorDavid Woodhouse <David.Woodhouse@intel.com>2009-07-04 14:08:36 +0100
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-07-04 14:12:01 +0100
commit736768325efcbee7b0861d62670d01a54c2d158b (patch)
treec0f235e88302ebaac1184aa3097c7f9c7cc2f1c8
parent62edf5dc4a524e4cb525e6020b955a1ad593d9ba (diff)
intel-iommu: No mapping for non-PCI devices
This should fix kernel.org bug #11821, where the dcdbas driver makes up a platform device and then uses dma_alloc_coherent() on it, in an attempt to get memory < 4GiB. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
-rw-r--r--drivers/pci/intel-iommu.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 5ee8305257e..fa052dd8991 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -2457,10 +2457,15 @@ static int iommu_should_identity_map(struct pci_dev *pdev)
}
/* Check if the pdev needs to go through non-identity map and unmap process.*/
-static int iommu_no_mapping(struct pci_dev *pdev)
+static int iommu_no_mapping(struct device *dev)
{
+ struct pci_dev *pdev;
int found;
+ if (unlikely(dev->bus != &pci_bus_type))
+ return 1;
+
+ pdev = to_pci_dev(dev);
if (iommu_dummy(pdev))
return 1;
@@ -2516,7 +2521,7 @@ static dma_addr_t __intel_map_single(struct device *hwdev, phys_addr_t paddr,
BUG_ON(dir == DMA_NONE);
- if (iommu_no_mapping(pdev))
+ if (iommu_no_mapping(hwdev))
return paddr;
domain = get_valid_domain_for_dev(pdev);
@@ -2656,7 +2661,7 @@ static void intel_unmap_page(struct device *dev, dma_addr_t dev_addr,
struct iova *iova;
struct intel_iommu *iommu;
- if (iommu_no_mapping(pdev))
+ if (iommu_no_mapping(dev))
return;
domain = find_domain(pdev);
@@ -2747,7 +2752,7 @@ static void intel_unmap_sg(struct device *hwdev, struct scatterlist *sglist,
struct iova *iova;
struct intel_iommu *iommu;
- if (iommu_no_mapping(pdev))
+ if (iommu_no_mapping(hwdev))
return;
domain = find_domain(pdev);
@@ -2806,7 +2811,7 @@ static int intel_map_sg(struct device *hwdev, struct scatterlist *sglist, int ne
struct intel_iommu *iommu;
BUG_ON(dir == DMA_NONE);
- if (iommu_no_mapping(pdev))
+ if (iommu_no_mapping(hwdev))
return intel_nontranslate_map_sg(hwdev, sglist, nelems, dir);
domain = get_valid_domain_for_dev(pdev);