diff --git a/include/nuttx/net/netdev.h b/include/nuttx/net/netdev.h
index be811e31e85..866e2cbfe27 100644
--- a/include/nuttx/net/netdev.h
+++ b/include/nuttx/net/netdev.h
@@ -496,10 +496,8 @@ int sixlowpan_input(FAR struct radio_driver_s *ieee,
  * Polling of connections
  *
  * These functions will traverse each active network connection structure
- * and perform appropriate operations:  devif_timer() will perform TCP timer
- * operations (and UDP polling operations); devif_poll() will perform TCP
- * and UDP polling operations. The CAN driver MUST implement logic to
- * periodically call devif_timer(); devif_poll() may be called asynchronously
+ * and perform appropriate operations:  devif_poll() will perform TCP
+ * and UDP polling operations. devif_poll() may be called asynchronously
  * from the network driver can accept another outgoing packet.
  *
  * In both cases, these functions will call the provided callback function
diff --git a/include/nuttx/net/radiodev.h b/include/nuttx/net/radiodev.h
index bc465a703d1..861d3a51f9b 100644
--- a/include/nuttx/net/radiodev.h
+++ b/include/nuttx/net/radiodev.h
@@ -68,11 +68,11 @@ struct radiodev_properties_s
  *     field of the IOB.
  *
  *     Outgoing frames are generated when the radio network driver calls
- *     the devif_poll(), devif_timer(), sixlowpan_input(), or
- *     ieee802154_input() interfaces.  In each case, the radio driver must
- *     provide a working buffer in the d_buf pointer.  A special form of
- *     the packet buffer must be used, struct sixlowpan_reassbuf_s.  This
- *     special for includes appended data for managing reassembly of packets.
+ *     the devif_poll(), sixlowpan_input(), or ieee802154_input()
+ *     interfaces.  In each case, the radio driver must provide a working
+ *     buffer in the d_buf pointer.  A special form of the packet buffer
+ *     must be used, struct sixlowpan_reassbuf_s.  This special for
+ *     includes appended data for managing reassembly of packets.
  *
  *   - Received frames are provided by radio network driver to the network
  *     via an IOB parameter in the sixlowpan_input() pr ieee802154_input()
diff --git a/net/arp/arp.h b/net/arp/arp.h
index a30c900561a..e466eab22de 100644
--- a/net/arp/arp.h
+++ b/net/arp/arp.h
@@ -215,7 +215,7 @@ int arp_send(in_addr_t ipaddr);
  *
  * Assumptions:
  *   This function is called from the MAC device driver indirectly through
- *   devif_poll() and devif_timer().  The network must be locked.
+ *   devif_poll().  The network must be locked.
  *
  ****************************************************************************/
 
diff --git a/net/arp/arp_poll.c b/net/arp/arp_poll.c
index 680879b12af..a9ca0fb1827 100644
--- a/net/arp/arp_poll.c
+++ b/net/arp/arp_poll.c
@@ -45,8 +45,8 @@
  *
  * Assumptions:
  *   This function is called from the MAC device driver indirectly through
- *   devif_poll() and devif_timer() and may be called from the timer
- *   interrupt/watchdog handler level.
+ *   devif_poll() and may be called from the timer  interrupt/watchdog
+ *   handler level.
  *
  ****************************************************************************/
 
diff --git a/net/ipforward/ipforward.h b/net/ipforward/ipforward.h
index ebc65519c04..30b8a9d973e 100644
--- a/net/ipforward/ipforward.h
+++ b/net/ipforward/ipforward.h
@@ -234,7 +234,7 @@ int ipfwd_forward(FAR struct forward_s *fwd);
  *
  * Assumptions:
  *   This function is called from the MAC device driver indirectly through
- *   devif_poll() and devif_timer().
+ *   devif_poll().
  *
  ****************************************************************************/
 
diff --git a/net/ipforward/ipfwd_poll.c b/net/ipforward/ipfwd_poll.c
index 9c6c65682b8..b3b909a40b9 100644
--- a/net/ipforward/ipfwd_poll.c
+++ b/net/ipforward/ipfwd_poll.c
@@ -153,7 +153,7 @@ static void ipfwd_packet_conversion(FAR struct net_driver_s *dev, int proto)
  *
  * Assumptions:
  *   This function is called from the MAC device driver indirectly through
- *   devif_poll() and devif_timer().
+ *   devif_poll().
  *
  ****************************************************************************/
 
diff --git a/net/sixlowpan/sixlowpan.h b/net/sixlowpan/sixlowpan.h
index 3185fc111d6..d56e2e2c78f 100644
--- a/net/sixlowpan/sixlowpan.h
+++ b/net/sixlowpan/sixlowpan.h
@@ -106,7 +106,7 @@ ssize_t psock_6lowpan_tcp_send(FAR struct socket *psock, FAR const void *buf,
  *   3. TCP output resulting from TX or timer polling
  *
  *   Cases 2 and 3 will be handled here.  Logic in ipv6_tcp_input(),
- *   devif_poll(), and devif_timer() detect if (1) an attempt to return with
+ *   and devif_poll() detect if (1) an attempt to return with
  *   d_len > 0 and (2) that the device is an IEEE802.15.4 MAC network
  *   driver. Under those conditions, this function will be called to create
  *   the IEEE80215.4 frames.
diff --git a/net/sixlowpan/sixlowpan_tcpsend.c b/net/sixlowpan/sixlowpan_tcpsend.c
index cd2d3d9f64f..02d4b92ea43 100644
--- a/net/sixlowpan/sixlowpan_tcpsend.c
+++ b/net/sixlowpan/sixlowpan_tcpsend.c
@@ -823,7 +823,7 @@ ssize_t psock_6lowpan_tcp_send(FAR struct socket *psock, FAR const void *buf,
  *   3. TCP output resulting from TX or timer polling
  *
  *   Cases 2 and 3 will be handled here.  Logic in ipv6_tcp_input(),
- *   devif_poll(), and devif_timer() detect if (1) an attempt to return with
+ *   and devif_poll() detect if (1) an attempt to return with
  *   d_len > 0 and (2) that the device is an IEEE802.15.4 MAC network
  *   driver. Under those conditions, this function will be called to create
  *   the IEEE80215.4 frames.
diff --git a/wireless/ieee802154/mac802154_loopback.c b/wireless/ieee802154/mac802154_loopback.c
index 72894415cb6..53005f6e80c 100644
--- a/wireless/ieee802154/mac802154_loopback.c
+++ b/wireless/ieee802154/mac802154_loopback.c
@@ -284,8 +284,8 @@ static inline void lo_netmask(FAR struct net_driver_s *dev)
  *
  * Description:
  *   Check if the network has any outgoing packets ready to send.  This is
- *   a callback from devif_poll() or devif_timer().  devif_poll() will be
- *   called only during normal TX polling.
+ *   a callback from devif_poll().  devif_poll() will be called only during
+ *   normal TX polling.
  *
  * Input Parameters:
  *   dev - Reference to the NuttX driver state structure
diff --git a/wireless/pktradio/pktradio_loopback.c b/wireless/pktradio/pktradio_loopback.c
index cd9d14f67c7..55f03dec361 100644
--- a/wireless/pktradio/pktradio_loopback.c
+++ b/wireless/pktradio/pktradio_loopback.c
@@ -273,8 +273,8 @@ static inline void lo_netmask(FAR struct net_driver_s *dev)
  *
  * Description:
  *   Check if the network has any outgoing packets ready to send.  This is
- *   a callback from devif_poll() or devif_timer().  devif_poll() will be
- *   called only during normal TX polling.
+ *   a callback from devif_poll().  devif_poll() will be called only during
+ *   normal TX polling.
  *
  * Input Parameters:
  *   dev - Reference to the NuttX driver state structure