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iommu/dma: Split iommu_dma_free

Browse source 
Most of it can double up to serve the failure cleanup path for
iommu_dma_alloc().

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Robin Murphy 2019-05-20 09:29:40 +02:00 committed by Joerg Roedel
parent 9a4ab94afc
commit 8553f6e652
1 changed files with 8 additions and 4 deletions
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12
drivers/iommu/dma-iommu.c
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@ -935,15 +935,12 @@ static void iommu_dma_unmap_resource(struct device *dev, dma_addr_t handle,
__iommu_dma_unmap(dev, handle, size);
}
static void iommu_dma_free(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t handle, unsigned long attrs)
static void __iommu_dma_free(struct device *dev, size_t size, void *cpu_addr)
{
size_t alloc_size = PAGE_ALIGN(size);
int count = alloc_size >> PAGE_SHIFT;
struct page *page = NULL, **pages = NULL;
__iommu_dma_unmap(dev, handle, size);
/* Non-coherent atomic allocation? Easy */
if (dma_free_from_pool(cpu_addr, alloc_size))
return;
@ -968,6 +965,13 @@ static void iommu_dma_free(struct device *dev, size_t size, void *cpu_addr,
__free_pages(page, get_order(alloc_size));
}
static void iommu_dma_free(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t handle, unsigned long attrs)
{
__iommu_dma_unmap(dev, handle, size);
__iommu_dma_free(dev, size, cpu_addr);
}
static void *iommu_dma_alloc(struct device *dev, size_t size,
dma_addr_t *handle, gfp_t gfp, unsigned long attrs)
{