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iommu/vt-d: Remove BUG_ON when domain->pgd is NULL

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When performing domain_context_mapping or getting dma_pte of a pfn, the
availability of the domain page table directory is ensured. Therefore,
the domain->pgd checkings are unnecessary.

Signed-off-by: Tina Zhang <tina.zhang@intel.com>
Link: https://lore.kernel.org/r/20230406065944.2773296-5-tina.zhang@intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Tina Zhang 2023-04-13 12:06:42 +08:00 committed by Joerg Roedel
parent 4a627a2593
commit 998d4c2db3
1 changed files with 0 additions and 4 deletions
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4
drivers/iommu/intel/iommu.c
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@ -915,8 +915,6 @@ static struct dma_pte *pfn_to_dma_pte(struct dmar_domain *domain,
int level = agaw_to_level(domain->agaw);
int offset;
BUG_ON(!domain->pgd);
if (!domain_pfn_supported(domain, pfn))
/* Address beyond IOMMU's addressing capabilities. */
return NULL;
@ -1910,8 +1908,6 @@ static int domain_context_mapping_one(struct dmar_domain *domain,
pr_debug("Set context mapping for %02x:%02x.%d\n",
bus, PCI_SLOT(devfn), PCI_FUNC(devfn));
BUG_ON(!domain->pgd);
spin_lock(&iommu->lock);
ret = -ENOMEM;
context = iommu_context_addr(iommu, bus, devfn, 1);