| Message ID | 20200527165617.297470-4-jonathan.derrick@intel.com |
|---|---|
| State | New |
| Headers | show |
| Series | iommu/vt-d: real DMA sub-device info allocation | expand |
On 2020/5/28 0:56, Jon Derrick wrote: > 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") > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=207575 > Signed-off-by: Jon Derrick <jonathan.derrick@intel.com> Acked-by: Lu Baolu <baolu.lu@linux.intel.com> Best regards, baolu > --- > drivers/iommu/intel-iommu.c | 3 --- > 1 file changed, 3 deletions(-) > > diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c > index 6d39b9b..5767882 100644 > --- a/drivers/iommu/intel-iommu.c > +++ b/drivers/iommu/intel-iommu.c > @@ -2436,9 +2436,6 @@ struct dmar_domain *find_domain(struct device *dev) > 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 = get_domain_info(dev); > if (likely(info)) >
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 6d39b9b..5767882 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -2436,9 +2436,6 @@ struct dmar_domain *find_domain(struct device *dev) 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 = get_domain_info(dev); if (likely(info))
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") Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=207575 Signed-off-by: Jon Derrick <jonathan.derrick@intel.com> --- drivers/iommu/intel-iommu.c | 3 --- 1 file changed, 3 deletions(-)