iommu/dma: Apply dma_{alloc,free}_contiguous functions

This patch replaces dma_{alloc,release}_from_contiguous() with
dma_{alloc,free}_contiguous() to simplify those function calls.

Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 0dee374fc64abe50d2a2b0ab0009949b10f5a6ef..cc0613c83d7175089db9240c494658b5ae34c72f 100644 (file)
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -951,8 +951,8 @@ static void __iommu_dma_free(struct device *dev, size_t size, void *cpu_addr)
 
        if (pages)
                __iommu_dma_free_pages(pages, count);
-       if (page && !dma_release_from_contiguous(dev, page, count))
-               __free_pages(page, get_order(alloc_size));
+       if (page)
+               dma_free_contiguous(dev, page, alloc_size);
 }
 
 static void iommu_dma_free(struct device *dev, size_t size, void *cpu_addr,
@@ -970,12 +970,7 @@ static void *iommu_dma_alloc_pages(struct device *dev, size_t size,
        struct page *page = NULL;
        void *cpu_addr;
 
-       if (gfpflags_allow_blocking(gfp))
-               page = dma_alloc_from_contiguous(dev, alloc_size >> PAGE_SHIFT,
-                                                get_order(alloc_size),
-                                                gfp & __GFP_NOWARN);
-       if (!page)
-               page = alloc_pages(gfp, get_order(alloc_size));
+       page = dma_alloc_contiguous(dev, alloc_size, gfp);
        if (!page)
                return NULL;
 
@@ -997,8 +992,7 @@ static void *iommu_dma_alloc_pages(struct device *dev, size_t size,
        memset(cpu_addr, 0, alloc_size);
        return cpu_addr;
 out_free_pages:
-       if (!dma_release_from_contiguous(dev, page, alloc_size >> PAGE_SHIFT))
-               __free_pages(page, get_order(alloc_size));
+       dma_free_contiguous(dev, page, alloc_size);
        return NULL;
 }