ARM: dma-mapping: Get pages if the cpu_addr is out of atomic_pool

In __iommu_get_pages(), the cpu_addr is checked wheather in
atomic_pool range or not. So if the cpu_addr is in atomic_pool
range, it does not need to check twice.

Signed-off-by: YoungJun Cho <yj44.cho@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index ef3e0f3..1d158c2 100644 (file)
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -1372,16 +1372,17 @@ static int arm_iommu_mmap_attrs(struct device *dev, struct vm_area_struct *vma,
 void arm_iommu_free_attrs(struct device *dev, size_t size, void *cpu_addr,
                          dma_addr_t handle, struct dma_attrs *attrs)
 {
-       struct page **pages = __iommu_get_pages(cpu_addr, attrs);
+       struct page **pages;
        size = PAGE_ALIGN(size);
 
-       if (!pages) {
-               WARN(1, "trying to free invalid coherent area: %p\n", cpu_addr);
+       if (__in_atomic_pool(cpu_addr, size)) {
+               __iommu_free_atomic(dev, cpu_addr, handle, size);
                return;
        }
 
-       if (__in_atomic_pool(cpu_addr, size)) {
-               __iommu_free_atomic(dev, cpu_addr, handle, size);
+       pages = __iommu_get_pages(cpu_addr, attrs);
+       if (!pages) {
+               WARN(1, "trying to free invalid coherent area: %p\n", cpu_addr);
                return;
        }