From 3f13f72787bcd15792c01a34c2aed8bdf38397bb Mon Sep 17 00:00:00 2001 From: Yanfei Xu Date: Wed, 14 Jun 2023 10:47:04 +0800 Subject: iommu/vt-d: Remove two WARN_ON in domain_context_mapping_one() Remove the WARN_ON(did == 0) as the domain id 0 is reserved and set once the domain_ids is allocated. So iommu_init_domains will never return 0. Remove the WARN_ON(!table) as this pointer will be accessed in the following code, if empty "table" really happens, the kernel will report a NULL pointer reference warning at the first place. Signed-off-by: Yanfei Xu Link: https://lore.kernel.org/r/20230605112659.308981-3-yanfei.xu@intel.com Signed-off-by: Lu Baolu Signed-off-by: Joerg Roedel --- drivers/iommu/intel/iommu.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'drivers/iommu') diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index e83fe243680b..4c0b7424c45e 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -1897,8 +1897,6 @@ static int domain_context_mapping_one(struct dmar_domain *domain, struct context_entry *context; int ret; - WARN_ON(did == 0); - if (hw_pass_through && domain_type_is_si(domain)) translation = CONTEXT_TT_PASS_THROUGH; @@ -1944,8 +1942,6 @@ static int domain_context_mapping_one(struct dmar_domain *domain, if (sm_supported(iommu)) { unsigned long pds; - WARN_ON(!table); - /* Setup the PASID DIR pointer: */ pds = context_get_sm_pds(table); context->lo = (u64)virt_to_phys(table->table) | -- cgit v1.2.3-70-g09d2