[PATCH 1/1] ARM: dma-mapping: Refactor out to introduce__in_atomic_pool

[Hiroshi Doyu]

Check the given range("start", "size") is included in "atomic_pool" or not.

Signed-off-by: Hiroshi Doyu <hdoyu@xxxxxxxxxx>
---
 arch/arm/mm/dma-mapping.c |   20 +++++++++++++++-----
 1 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 30bef80..26080ef 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -450,20 +450,30 @@ static void *__alloc_from_pool(size_t size, struct page **ret_page)
 	return ptr;
 }
 
-static int __free_from_pool(void *start, size_t size)
+static bool __in_atomic_pool(void *start, size_t size)
 {
 	struct dma_pool *pool = &atomic_pool;
-	unsigned long pageno, count;
-	unsigned long flags;
 
 	if (start < pool->vaddr || start > pool->vaddr + pool->size)
-		return 0;
+		return false;
 
 	if (start + size > pool->vaddr + pool->size) {
 		WARN(1, "freeing wrong coherent size from pool\n");
-		return 0;
+		return false;
 	}
 
+	return true;
+}
+
+static int __free_from_pool(void *start, size_t size)
+{
+	struct dma_pool *pool = &atomic_pool;
+	unsigned long pageno, count;
+	unsigned long flags;
+
+	if (!__in_atomic_pool(start, size))
+		return 0;
+
 	pageno = (start - pool->vaddr) >> PAGE_SHIFT;
 	count = size >> PAGE_SHIFT;
 
-- 
1.7.5.4
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