diff --git a/sys/powerpc/powerpc/busdma_machdep.c b/sys/powerpc/powerpc/busdma_machdep.c
--- a/sys/powerpc/powerpc/busdma_machdep.c
+++ b/sys/powerpc/powerpc/busdma_machdep.c
@@ -303,6 +303,9 @@
 		return (ENOMEM);
 	}
 
+	/* Initialize the new map */
+	STAILQ_INIT(&((*mapp)->bpages));
+
 	/*
 	 * Bouncing might be required if the driver asks for an active
 	 * exclusion region, a data alignment that is stricter than 1, and/or
@@ -319,9 +322,6 @@
 		}
 		bz = dmat->bounce_zone;
 
-		/* Initialize the new map */
-		STAILQ_INIT(&((*mapp)->bpages));
-
 		/*
 		 * Attempt to add pages to our pool on a per-instance
 		 * basis up to a sane limit.