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 <[email protected]>
Acked-by: Lu Baolu <[email protected]> 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))
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