Index: sys/powerpc/ofw/ofw_real.c
===================================================================
--- sys/powerpc/ofw/ofw_real.c
+++ sys/powerpc/ofw/ofw_real.c
@@ -211,9 +211,11 @@
 
 	mtx_lock(&of_bounce_mtx);
 
-	of_bounce_virt = contigmalloc(4 * PAGE_SIZE, M_OFWREAL, 0, 0,
+	of_bounce_virt = contigmalloc(4 * PAGE_SIZE, M_OFWREAL, M_NOWAIT, 0,
 	    ulmin(platform_real_maxaddr(), BUS_SPACE_MAXADDR_32BIT), PAGE_SIZE,
 	    4 * PAGE_SIZE);
+	if (of_bounce_virt == NULL)
+		panic("Not able to allocated contiguous memory\n");
 
 	of_bounce_phys = vtophys(of_bounce_virt);
 	of_bounce_size = 4 * PAGE_SIZE;