diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index 23004847bb05..78d8e9b5544f 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -91,6 +91,7 @@ static inline dma_addr_t virt_to_dma(struct device *dev, void *addr)
  */
 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
 {
+	debug_dma_mapping_error(dev, dma_addr);
 	return dma_addr == DMA_ERROR_CODE;
 }
 
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 477a2d23ddf1..58bc3e4d3bd0 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -610,7 +610,7 @@ static void *__dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
 			 gfp_t gfp, pgprot_t prot, bool is_coherent, const void *caller)
 {
 	u64 mask = get_coherent_dma_mask(dev);
-	struct page *page;
+	struct page *page = NULL;
 	void *addr;
 
 #ifdef CONFIG_DMA_API_DEBUG
diff --git a/arch/arm/mm/vmregion.h b/arch/arm/mm/vmregion.h
index bf312c354a21..0f5a5f2a2c7b 100644
--- a/arch/arm/mm/vmregion.h
+++ b/arch/arm/mm/vmregion.h
@@ -17,7 +17,6 @@ struct arm_vmregion {
 	struct list_head	vm_list;
 	unsigned long		vm_start;
 	unsigned long		vm_end;
-	void			*priv;
 	int			vm_active;
 	const void		*caller;
 };
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index 08b4c5209384..b34b5cda5ae1 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -236,7 +236,7 @@ config CMA_SIZE_PERCENTAGE
 
 choice
 	prompt "Selected region size"
-	default CMA_SIZE_SEL_ABSOLUTE
+	default CMA_SIZE_SEL_MBYTES
 
 config CMA_SIZE_SEL_MBYTES
 	bool "Use mega bytes value only"
diff --git a/drivers/base/dma-coherent.c b/drivers/base/dma-coherent.c
index 560a7173f810..bc256b641027 100644
--- a/drivers/base/dma-coherent.c
+++ b/drivers/base/dma-coherent.c
@@ -191,9 +191,8 @@ EXPORT_SYMBOL(dma_release_from_coherent);
  * This checks whether the memory was allocated from the per-device
  * coherent memory pool and if so, maps that memory to the provided vma.
  *
- * Returns 1 if we correctly mapped the memory, or 0 if
- * dma_release_coherent() should proceed with mapping memory from
- * generic pools.
+ * Returns 1 if we correctly mapped the memory, or 0 if the caller should
+ * proceed with mapping memory from generic pools.
  */
 int dma_mmap_from_coherent(struct device *dev, struct vm_area_struct *vma,
 			   void *vaddr, size_t size, int *ret)
diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
index 9a1469474f55..612afcc5a938 100644
--- a/drivers/base/dma-contiguous.c
+++ b/drivers/base/dma-contiguous.c
@@ -27,15 +27,12 @@
 #include <linux/mm.h>
 #include <linux/mutex.h>
 #include <linux/page-isolation.h>
+#include <linux/sizes.h>
 #include <linux/slab.h>
 #include <linux/swap.h>
 #include <linux/mm_types.h>
 #include <linux/dma-contiguous.h>
 
-#ifndef SZ_1M
-#define SZ_1M (1 << 20)
-#endif
-
 struct cma {
 	unsigned long	base_pfn;
 	unsigned long	count;
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index bb90971182bd..b0012ab372a4 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5825,7 +5825,7 @@ int alloc_contig_range(unsigned long start, unsigned long end,
 	ret = start_isolate_page_range(pfn_max_align_down(start),
 				       pfn_max_align_up(end), migratetype);
 	if (ret)
-		goto done;
+		return ret;
 
 	ret = __alloc_contig_migrate_range(&cc, start, end);
 	if (ret)