diff --git a/ddbridge/ddbridge-core.c b/ddbridge/ddbridge-core.c
index 2a7f886..1e5206c 100644
--- a/ddbridge/ddbridge-core.c
+++ b/ddbridge/ddbridge-core.c
@@ -498,9 +498,9 @@ static int ddb_redirect(u32 i, u32 p)
 	struct ddb *pdev = ddbs[(p >> 4) & 0x3f];
 	struct ddb_port *port;
 
-	if (!idev->has_dma || !pdev->has_dma)
+	if (!pdev || !idev)
 		return -EINVAL;
-	if (!idev || !pdev)
+	if (!pdev->has_dma || !idev->has_dma)
 		return -EINVAL;
 
 	port = &pdev->port[p & 0x0f];