From: Jon Derrick <[email protected]>
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 <[email protected]>
Acked-by: Lu Baolu <[email protected]>
Link:
https://lore.kernel.org/r/[email protected]
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=207575
Signed-off-by: Joerg Roedel <[email protected]>
Signed-off-by: Sushma Kalakota <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
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))
