1 files changed, 16 insertions, 0 deletions

diff --git a/kernel/dma/debug.c b/kernel/dma/debug.c
index c007d25bee09..231ca4628062 100644
--- a/kernel/dma/debug.c
+++ b/kernel/dma/debug.c
@@ -1312,6 +1312,22 @@ static void check_sg_segment(struct device *dev, struct scatterlist *sg)
 #endif
 }
 
+void debug_dma_map_single(struct device *dev, const void *addr,
+                            unsigned long len)
+{
+        if (unlikely(dma_debug_disabled()))
+                return;
+
+        if (!virt_addr_valid(addr))
+                err_printk(dev, NULL, "DMA-API: device driver maps memory from invalid area [addr=%p] [len=%lu]\n",
+                           addr, len);
+
+        if (is_vmalloc_addr(addr))
+                err_printk(dev, NULL, "DMA-API: device driver maps memory from vmalloc area [addr=%p] [len=%lu]\n",
+                           addr, len);
+}
+EXPORT_SYMBOL(debug_dma_map_single);
+
 void debug_dma_map_page(struct device *dev, struct page *page, size_t offset,
                         size_t size, int direction, dma_addr_t dma_addr,
                         bool map_single)