diff --git a/sound/arm/aaci.c b/sound/arm/aaci.c
index 5c48e36..dc78272 100644
--- a/sound/arm/aaci.c
+++ b/sound/arm/aaci.c
@@ -1089,7 +1089,7 @@
 		goto out;
 	}
 
-	aaci->base = ioremap(dev->res.start, SZ_4K);
+	aaci->base = ioremap(dev->res.start, resource_size(&dev->res));
 	if (!aaci->base) {
 		ret = -ENOMEM;
 		goto out;