[PATCH] staging: ion : ion_cma_heap: fix bug for highmem cma

[Zeng Tao]

when cma is located in highmem, virt_to_page will not
work the right way, use pfn_to_page instead.

Signed-off-by: Zeng Tao <prime.zeng@xxxxxxxxxx>
---
 drivers/staging/android/ion/ion_cma_heap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/android/ion/ion_cma_heap.c b/drivers/staging/android/ion/ion_cma_heap.c
index f8cabcb..cc45fc0 100644
--- a/drivers/staging/android/ion/ion_cma_heap.c
+++ b/drivers/staging/android/ion/ion_cma_heap.c
@@ -47,7 +47,7 @@ struct ion_cma_buffer_info {
 static int ion_cma_get_sgtable(struct device *dev, struct sg_table *sgt,
 			       void *cpu_addr, dma_addr_t handle, size_t size)
 {
-	struct page *page = virt_to_page(cpu_addr);
+	struct page *page = pfn_to_page(handle >> PAGE_SHIFT);
 	int ret;
 
 	ret = sg_alloc_table(sgt, 1, GFP_KERNEL);
-- 
1.9.1

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