diff --git a/[refs] b/[refs]
index ed50e0c2b23e..ac9c03083e0d 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 84be58d4601c86306cd939ebf58a9b90989883a4
+refs/heads/master: 35d40952dba7b0689a16bd1463fb7698f8dbe639
diff --git a/trunk/lib/dma-debug.c b/trunk/lib/dma-debug.c
index 9a350b414a50..f9e6d38b4b34 100644
--- a/trunk/lib/dma-debug.c
+++ b/trunk/lib/dma-debug.c
@@ -531,8 +531,11 @@ static void check_unmap(struct dma_debug_entry *ref)
 	struct hash_bucket *bucket;
 	unsigned long flags;
 
-	if (dma_mapping_error(ref->dev, ref->dev_addr))
+	if (dma_mapping_error(ref->dev, ref->dev_addr)) {
+		err_printk(ref->dev, NULL, "DMA-API: device driver tries "
+			   "to free an invalid DMA memory address\n");
 		return;
+	}
 
 	bucket = get_hash_bucket(ref, &flags);
 	entry = hash_bucket_find(bucket, ref);