Hi,
On 1/18/20 12:27 AM, Jon Derrick wrote:
The PCI device may have a DMA requester on another bus, such as VMD
subdevices needing to use the VMD endpoint. This case requires the real
DMA device when mapping to IOMMU.
Signed-off-by: Jon Derrick<jonathan.derrick@xxxxxxxxx>
---
drivers/iommu/intel-iommu.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 0c8d81f..01a1b0f 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -782,6 +782,8 @@ static struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devf
return NULL;
#endif
+ pdev = pci_real_dma_dev(dev);
This isn't correct. It will result in a compiling error when bisect.
Best regards,
baolu
