samples: net: echo_server: Decrease buffer for atsamr21_xpro

From 2.3 to 2.4 the net samples pair echo-server/client increase the
SRAM requirements. Since CI doesn't build all combinations, (even for
a release like 2.4.0-rc1) the problem was detected only now.  Decrease
buffers for atsamr21_xpro on both echo_server/client sample pair.

Fixes zephyrproject-rtos#28341.

Signed-off-by: Gerson Fernando Budke <[email protected]>

Author: nandojve

boards/arm/atsamr21_xpro/atsamr21_xpro.yaml

@@ -1,4 +1,4 @@
-# Copyright (c) 2019 Gerson Fernando Budke
+# Copyright (c) 2019-2020 Gerson Fernando Budke
 # Copyright (c) 2019 Benjamin Valentin
 # SPDX-License-Identifier: Apache-2.0
 identifier: atsamr21_xpro
@@ -15,6 +15,7 @@ supported:
   - gpio
   - i2c
   - ieee802154
+  - netif
   - pwm
   - spi
   - usb_device

samples/net/sockets/echo_client/boards/atsamr21_xpro.conf

@@ -10,16 +10,16 @@ CONFIG_NET_CONFIG_IEEE802154_DEV_NAME="RF2XX_0"
 # Reduced buffers to fit into SAMR21 SoC
 CONFIG_CPLUSPLUS=n
 
-CONFIG_NET_PKT_RX_COUNT=8
-CONFIG_NET_PKT_TX_COUNT=8
-CONFIG_NET_BUF_RX_COUNT=8
-CONFIG_NET_BUF_TX_COUNT=8
+CONFIG_NET_PKT_RX_COUNT=6
+CONFIG_NET_PKT_TX_COUNT=6
+CONFIG_NET_BUF_RX_COUNT=6
+CONFIG_NET_BUF_TX_COUNT=6
 CONFIG_NET_MAX_CONTEXTS=4
 CONFIG_NET_MAX_CONN=2
-CONFIG_NET_MAX_ROUTES=4
+CONFIG_NET_MAX_ROUTES=2
 CONFIG_NET_MAX_NEXTHOPS=2
 
 CONFIG_SHELL_STACK_SIZE=768
 CONFIG_SHELL_CMD_BUFF_SIZE=80
 CONFIG_SHELL_ARGC_MAX=6
-CONFIG_SHELL_HISTORY_BUFFER=128
+CONFIG_SHELL_HISTORY_BUFFER=64

samples/net/sockets/echo_server/boards/atsamr21_xpro.conf

@@ -10,16 +10,16 @@ CONFIG_NET_CONFIG_IEEE802154_DEV_NAME="RF2XX_0"
 # Reduced buffers to fit into SAMR21 SoC
 CONFIG_CPLUSPLUS=n
 
-CONFIG_NET_PKT_RX_COUNT=8
-CONFIG_NET_PKT_TX_COUNT=8
-CONFIG_NET_BUF_RX_COUNT=8
-CONFIG_NET_BUF_TX_COUNT=8
+CONFIG_NET_PKT_RX_COUNT=6
+CONFIG_NET_PKT_TX_COUNT=6
+CONFIG_NET_BUF_RX_COUNT=6
+CONFIG_NET_BUF_TX_COUNT=6
 CONFIG_NET_MAX_CONTEXTS=4
 CONFIG_NET_MAX_CONN=2
-CONFIG_NET_MAX_ROUTES=4
+CONFIG_NET_MAX_ROUTES=2
 CONFIG_NET_MAX_NEXTHOPS=2
 
 CONFIG_SHELL_STACK_SIZE=768
 CONFIG_SHELL_CMD_BUFF_SIZE=80
 CONFIG_SHELL_ARGC_MAX=6
-CONFIG_SHELL_HISTORY_BUFFER=128
+CONFIG_SHELL_HISTORY_BUFFER=64