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 <yanfei.xu@intel.com>
Link: https://lore.kernel.org/r/20230605112659.308981-3-yanfei.xu@intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index e83fe243680b1af7d2e658a94f24934fdac6d365..4c0b7424c45ee75724acba6efe9c124135b3dd7b 100644 (file)
--- 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) |