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iommu/vt-d: Remove BUG_ON on checking valid pfn range

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When encountering an unexpected invalid pfn range, the kernel should
attempt recovery and proceed with execution. Therefore, using WARN_ON to
replace BUG_ON to avoid halting the machine.

Besides, one redundant checking is reduced.

Signed-off-by: Tina Zhang <tina.zhang@intel.com>
Link: https://lore.kernel.org/r/20230406065944.2773296-3-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 12:06:40 +08:00 committed by Joerg Roedel
parent b31064f881
commit 35dc5d8998
1 changed files with 6 additions and 6 deletions
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12
drivers/iommu/intel/iommu.c
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@ -1005,9 +1005,9 @@ static void dma_pte_clear_range(struct dmar_domain *domain,
unsigned int large_page;
struct dma_pte *first_pte, *pte;
BUG_ON(!domain_pfn_supported(domain, start_pfn));
BUG_ON(!domain_pfn_supported(domain, last_pfn));
BUG_ON(start_pfn > last_pfn);
if (WARN_ON(!domain_pfn_supported(domain, last_pfn)) ||
WARN_ON(start_pfn > last_pfn))
return;
/* we don't need lock here; nobody else touches the iova range */
do {
@ -1166,9 +1166,9 @@ next:
static void domain_unmap(struct dmar_domain *domain, unsigned long start_pfn,
unsigned long last_pfn, struct list_head *freelist)
{
BUG_ON(!domain_pfn_supported(domain, start_pfn));
BUG_ON(!domain_pfn_supported(domain, last_pfn));
BUG_ON(start_pfn > last_pfn);
if (WARN_ON(!domain_pfn_supported(domain, last_pfn)) ||
WARN_ON(start_pfn > last_pfn))
return;
/* we don't need lock here; nobody else touches the iova range */
dma_pte_clear_level(domain, agaw_to_level(domain->agaw),