iommu/vt-d: Use pci_real_dma_dev() for mapping

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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 for the IOMMU mapping, so use pci_real_dma_dev() to find that
device.

Link: https://lore.kernel.org/r/1579613871-301529-5-git-send-email-jonathan.derrick@intel.com
Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>

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Jon Derrick 2020-01-21 06:37:48 -07:00 • committed by Bjorn Helgaas

parent 2856ba6020

commit 2b0140c696

1 changed files with 5 additions and 0 deletions

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drivers/iommu/intel-iommu.c

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