[PATCH 20/25] iommu/vt-d: Remove unused domain_get_iommu()

[Lu Baolu]

It is not used anywhere. Remove it to avoid dead code.

Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
Reviewed-by: Steve Wahl <steve.wahl@xxxxxxx>
Link: https://lore.kernel.org/r/20220702015610.2849494-2-baolu.lu@xxxxxxxxxxxxxxx
---
 drivers/iommu/intel/iommu.h |  1 -
 drivers/iommu/intel/iommu.c | 18 ------------------
 2 files changed, 19 deletions(-)

diff --git a/drivers/iommu/intel/iommu.h b/drivers/iommu/intel/iommu.h
index df64d3d9c49a..56e0d8cd2102 100644
--- a/drivers/iommu/intel/iommu.h
+++ b/drivers/iommu/intel/iommu.h
@@ -725,7 +725,6 @@ extern int dmar_ir_support(void);
 
 void *alloc_pgtable_page(int node);
 void free_pgtable_page(void *vaddr);
-struct intel_iommu *domain_get_iommu(struct dmar_domain *domain);
 void iommu_flush_write_buffer(struct intel_iommu *iommu);
 int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct device *dev);
 struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devfn);
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 769e850b9767..55a055a8ed4b 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -445,24 +445,6 @@ int iommu_calculate_agaw(struct intel_iommu *iommu)
 	return __iommu_calculate_agaw(iommu, DEFAULT_DOMAIN_ADDRESS_WIDTH);
 }
 
-/* This functionin only returns single iommu in a domain */
-struct intel_iommu *domain_get_iommu(struct dmar_domain *domain)
-{
-	int iommu_id;
-
-	/* si_domain and vm domain should not get here. */
-	if (WARN_ON(!iommu_is_dma_domain(&domain->domain)))
-		return NULL;
-
-	for_each_domain_iommu(iommu_id, domain)
-		break;
-
-	if (iommu_id < 0 || iommu_id >= g_num_of_iommus)
-		return NULL;
-
-	return g_iommus[iommu_id];
-}
-
 static inline bool iommu_paging_structure_coherency(struct intel_iommu *iommu)
 {
 	return sm_supported(iommu) ?
-- 
2.25.1