-#define BUF_SM 0x00000000 /* These two are used for push_rxbufs() */
-#define BUF_LG 0x00000001 /* CMD, Write_FreeBufQ, LBUF bit */
+/*
+ * BUF_XX distinguish the Rx buffers depending on their (small/large) size.
+ * BUG_SM and BUG_LG are both used by the driver and the device.
+ * BUF_NONE is only used by the driver.
+ */
+#define BUF_SM 0x00000000 /* These two are used for push_rxbufs() */
+#define BUF_LG 0x00000001 /* CMD, Write_FreeBufQ, LBUF bit */
+#define BUF_NONE 0xffffffff /* Software only: */