diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h
index b89a7f382c6c..0f2704c7e959 100644
--- a/arch/arm64/include/asm/dma-mapping.h
+++ b/arch/arm64/include/asm/dma-mapping.h
@@ -65,8 +65,6 @@ void arch_teardown_dma_ops(struct device *dev);
 /* do not use this function in a driver */
 static inline bool is_device_dma_coherent(struct device *dev)
 {
-	if (!dev)
-		return false;
 	return dev->archdata.dma_coherent;
 }
 
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index 75088c00cbf1..927cc5f276cd 100644
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -157,11 +157,6 @@ static void *__dma_alloc_coherent(struct device *dev, size_t size,
 				  dma_addr_t *dma_handle, gfp_t flags,
 				  unsigned long attrs)
 {
-	if (dev == NULL) {
-		WARN_ONCE(1, "Use an actual device structure for DMA allocation\n");
-		return NULL;
-	}
-
 	if (IS_ENABLED(CONFIG_ZONE_DMA) &&
 	    dev->coherent_dma_mask <= DMA_BIT_MASK(32))
 		flags |= GFP_DMA;
@@ -201,10 +196,6 @@ static void __dma_free_coherent(struct device *dev, size_t size,
 	phys_addr_t paddr = dma_to_phys(dev, dma_handle);
 
 	size = PAGE_ALIGN(size);
-	if (dev == NULL) {
-		WARN_ONCE(1, "Use an actual device structure for DMA allocation\n");
-		return;
-	}
 
 	if ((attrs & DMA_ATTR_NO_KERNEL_MAPPING) ||
 	    (attrs & DMA_ATTR_STRONGLY_ORDERED))