From: Jon Derrick <jonathan.derrick@xxxxxxxxx>
commit bba9cc2cf82840bd3c9b3f4f7edac2dc8329c241 upstream.
By removing the real DMA indirection in find_domain(), we can allow
sub-devices of a real DMA device to have their own valid
device_domain_info. The dmar lookup and context entry removal paths have
been fixed to account for sub-devices.
Fixes: 2b0140c69637 ("iommu/vt-d: Use pci_real_dma_dev() for mapping")
Signed-off-by: Jon Derrick <jonathan.derrick@xxxxxxxxx>
Acked-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20200527165617.297470-4-jonathan.derrick@xxxxxxxxx
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=207575
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Signed-off-by: Sushma Kalakota <sushmax.kalakota@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iommu/intel-iommu.c | 3 ---
1 file changed, 3 deletions(-)
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -2518,9 +2518,6 @@ struct dmar_domain *find_domain(struct d
if (unlikely(attach_deferred(dev) || iommu_dummy(dev)))
return NULL;
- if (dev_is_pci(dev))
- dev = &pci_real_dma_dev(to_pci_dev(dev))->dev;
-
/* No lock here, assumes no domain exit in normal case */
info = dev->archdata.iommu;
if (likely(info))
