1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/base/dma-mapping.c b/drivers/base/dma-mapping.c
index db5db02e885f..3fbedc75e7c5 100644
--- a/drivers/base/dma-mapping.c
+++ b/drivers/base/dma-mapping.c
@@ -218,6 +218,24 @@ void dmam_release_declared_memory(struct device *dev)
 }
 EXPORT_SYMBOL(dmam_release_declared_memory);
 
+/*
+ * Create scatter-list for the already allocated DMA buffer.
+ */
+int dma_common_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);
+        int ret;
+
+        ret = sg_alloc_table(sgt, 1, GFP_KERNEL);
+        if (unlikely(ret))
+                return ret;
+
+        sg_set_page(sgt->sgl, page, PAGE_ALIGN(size), 0);
+        return 0;
+}
+EXPORT_SYMBOL(dma_common_get_sgtable);
+
 #endif
 
 /*