diff --git a/arch/arm/src/lpc17xx/lpc17_emacram.h b/arch/arm/src/lpc17xx/lpc17_emacram.h
index 7d98106b12..5e8df85b31 100644
--- a/arch/arm/src/lpc17xx/lpc17_emacram.h
+++ b/arch/arm/src/lpc17xx/lpc17_emacram.h
@@ -132,8 +132,9 @@
  *
  *  16384 <= ntx * (pktsize + 8 + 4) + nrx * (pktsize + 8 + 8)
  *
- * If ntx == nrx and pktsize == 590, then you could have ntx = nrx = 13.  In this
- * case, you would need only 15,704 bytes of EMAC RAM (but be careful with alignment!).
+ * If ntx == nrx and pktsize == 590+2, then you could have ntx = nrx = 13.  In this
+ * case, you would need only 15,756 bytes of EMAC RAM (but be careful with alignment!
+ * 15,756 is not well aligned.).
  */
 
 #define LPC17_TXDESCTAB_SIZE (CONFIG_NET_NTXDESC*LPC17_TXDESC_SIZE)
diff --git a/arch/arm/src/lpc17xx/lpc17_ethernet.c b/arch/arm/src/lpc17xx/lpc17_ethernet.c
index b2fa43a4d6..6f684d3844 100644
--- a/arch/arm/src/lpc17xx/lpc17_ethernet.c
+++ b/arch/arm/src/lpc17xx/lpc17_ethernet.c
@@ -1983,7 +1983,6 @@ static inline void lpc17_txavail_process(FAR struct lpc17_driver_s *priv)
     }
 
   net_unlock(state);
-  return OK;
 }
 
 /****************************************************************************
diff --git a/configs/olimex-lpc1766stk/ftpc/defconfig b/configs/olimex-lpc1766stk/ftpc/defconfig
index adbacca26d..1072bba8b0 100644
--- a/configs/olimex-lpc1766stk/ftpc/defconfig
+++ b/configs/olimex-lpc1766stk/ftpc/defconfig
@@ -205,7 +205,7 @@ CONFIG_LPC17_SSP1=y
 # Ethernet driver options
 #
 CONFIG_PHY_AUTONEG=y
-CONFIG_NET_EMACRAM_SIZE=8480
+CONFIG_NET_EMACRAM_SIZE=8512
 CONFIG_NET_NTXDESC=7
 CONFIG_NET_NRXDESC=7
 # CONFIG_NET_WOL is not set
diff --git a/configs/olimex-lpc1766stk/nettest/defconfig b/configs/olimex-lpc1766stk/nettest/defconfig
index f53fe63f12..73c32b754e 100644
--- a/configs/olimex-lpc1766stk/nettest/defconfig
+++ b/configs/olimex-lpc1766stk/nettest/defconfig
@@ -206,7 +206,7 @@ CONFIG_LPC17_UART0=y
 # Ethernet driver options
 #
 CONFIG_PHY_AUTONEG=y
-CONFIG_NET_EMACRAM_SIZE=7264
+CONFIG_NET_EMACRAM_SIZE=7296
 CONFIG_NET_NTXDESC=6
 CONFIG_NET_NRXDESC=6
 # CONFIG_NET_WOL is not set
diff --git a/configs/olimex-lpc1766stk/nsh/defconfig b/configs/olimex-lpc1766stk/nsh/defconfig
index 0081588672..ef69f217c4 100644
--- a/configs/olimex-lpc1766stk/nsh/defconfig
+++ b/configs/olimex-lpc1766stk/nsh/defconfig
@@ -206,7 +206,7 @@ CONFIG_LPC17_SSP1=y
 # Ethernet driver options
 #
 CONFIG_PHY_AUTONEG=y
-CONFIG_NET_EMACRAM_SIZE=7264
+CONFIG_NET_EMACRAM_SIZE=7296
 CONFIG_NET_NTXDESC=6
 CONFIG_NET_NRXDESC=6
 # CONFIG_NET_WOL is not set
diff --git a/configs/olimex-lpc1766stk/thttpd/defconfig b/configs/olimex-lpc1766stk/thttpd/defconfig
index b8804d6b06..9846b7f232 100644
--- a/configs/olimex-lpc1766stk/thttpd/defconfig
+++ b/configs/olimex-lpc1766stk/thttpd/defconfig
@@ -206,7 +206,7 @@ CONFIG_LPC17_UART0=y
 # Ethernet driver options
 #
 CONFIG_PHY_AUTONEG=y
-CONFIG_NET_EMACRAM_SIZE=15712
+CONFIG_NET_EMACRAM_SIZE=15776
 CONFIG_NET_NTXDESC=13
 CONFIG_NET_NRXDESC=13
 # CONFIG_NET_WOL is not set
diff --git a/configs/olimex-lpc1766stk/zmodem/defconfig b/configs/olimex-lpc1766stk/zmodem/defconfig
index dc4d6bfd06..969d8d37b3 100644
--- a/configs/olimex-lpc1766stk/zmodem/defconfig
+++ b/configs/olimex-lpc1766stk/zmodem/defconfig
@@ -207,7 +207,7 @@ CONFIG_LPC17_SSP1=y
 # Ethernet driver options
 #
 CONFIG_PHY_AUTONEG=y
-CONFIG_NET_EMACRAM_SIZE=7264
+CONFIG_NET_EMACRAM_SIZE=7296
 CONFIG_NET_NTXDESC=6
 CONFIG_NET_NRXDESC=6
 # CONFIG_NET_WOL is not set