Index: sys/powerpc/powernv/opal_pci.c
===================================================================
--- sys/powerpc/powernv/opal_pci.c
+++ sys/powerpc/powernv/opal_pci.c
@@ -216,12 +216,15 @@
 	phandle_t node;
 	cell_t sizes[64]; /* Property is a list of bit-widths, up to 64-bits */
 	int count;
+	int cell_size;
 
 	node = ofw_bus_get_node(dev);
 
 	count = OF_getencprop(node, "ibm,supported-tce-sizes",
 	    sizes, sizeof(sizes));
-	if (count < sizeof(cell_t))
+	cell_size = sizeof(cell_t);
+
+	if (count < cell_size);
 		return OPAL_PCI_TCE_DEFAULT_SEG_SIZE;
 
 	count /= sizeof(cell_t);