diff --git a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
index 02d9408d41bcf..7e065b3723cff 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
@@ -69,9 +69,11 @@ static int etnaviv_context_map(struct etnaviv_iommu_context *context,
 	return ret;
 }
 
-static int etnaviv_iommu_map(struct etnaviv_iommu_context *context, u32 iova,
+static int etnaviv_iommu_map(struct etnaviv_iommu_context *context,
+			     u32 iova, unsigned int va_len,
 			     struct sg_table *sgt, int prot)
-{	struct scatterlist *sg;
+{
+	struct scatterlist *sg;
 	unsigned int da = iova;
 	unsigned int i;
 	int ret;
@@ -81,14 +83,16 @@ static int etnaviv_iommu_map(struct etnaviv_iommu_context *context, u32 iova,
 
 	for_each_sgtable_dma_sg(sgt, sg, i) {
 		phys_addr_t pa = sg_dma_address(sg) - sg->offset;
-		size_t bytes = sg_dma_len(sg) + sg->offset;
+		unsigned int da_len = sg_dma_len(sg) + sg->offset;
+		unsigned int bytes = min_t(unsigned int, da_len, va_len);
 
-		VERB("map[%d]: %08x %pap(%zx)", i, iova, &pa, bytes);
+		VERB("map[%d]: %08x %pap(%x)", i, iova, &pa, bytes);
 
 		ret = etnaviv_context_map(context, da, pa, bytes, prot);
 		if (ret)
 			goto fail;
 
+		va_len -= bytes;
 		da += bytes;
 	}
 
@@ -104,21 +108,7 @@ static int etnaviv_iommu_map(struct etnaviv_iommu_context *context, u32 iova,
 static void etnaviv_iommu_unmap(struct etnaviv_iommu_context *context, u32 iova,
 				struct sg_table *sgt, unsigned len)
 {
-	struct scatterlist *sg;
-	unsigned int da = iova;
-	int i;
-
-	for_each_sgtable_dma_sg(sgt, sg, i) {
-		size_t bytes = sg_dma_len(sg) + sg->offset;
-
-		etnaviv_context_unmap(context, da, bytes);
-
-		VERB("unmap[%d]: %08x(%zx)", i, iova, bytes);
-
-		BUG_ON(!PAGE_ALIGNED(bytes));
-
-		da += bytes;
-	}
+	etnaviv_context_unmap(context, iova, len);
 
 	context->flush_seq++;
 }
@@ -131,7 +121,7 @@ static void etnaviv_iommu_remove_mapping(struct etnaviv_iommu_context *context,
 	lockdep_assert_held(&context->lock);
 
 	etnaviv_iommu_unmap(context, mapping->vram_node.start,
-			    etnaviv_obj->sgt, etnaviv_obj->base.size);
+			    etnaviv_obj->sgt, etnaviv_obj->size);
 	drm_mm_remove_node(&mapping->vram_node);
 }
 
@@ -305,16 +295,14 @@ int etnaviv_iommu_map_gem(struct etnaviv_iommu_context *context,
 	node = &mapping->vram_node;
 
 	if (va)
-		ret = etnaviv_iommu_insert_exact(context, node,
-						 etnaviv_obj->base.size, va);
+		ret = etnaviv_iommu_insert_exact(context, node, etnaviv_obj->size, va);
 	else
-		ret = etnaviv_iommu_find_iova(context, node,
-					      etnaviv_obj->base.size);
+		ret = etnaviv_iommu_find_iova(context, node, etnaviv_obj->size);
 	if (ret < 0)
 		goto unlock;
 
 	mapping->iova = node->start;
-	ret = etnaviv_iommu_map(context, node->start, sgt,
+	ret = etnaviv_iommu_map(context, node->start, etnaviv_obj->size, sgt,
 				ETNAVIV_PROT_READ | ETNAVIV_PROT_WRITE);
 
 	if (ret < 0) {