net/tcp: define a fallback value for rcv_wnd size
Some driver implements it's own network packet pool, so PKTBUFSRX is zero.
This results in zero-size TCP receive window, so data transfer doesn't
work. Avoid it by setting a reasonable fallback value.
Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/net/tcp.c b/net/tcp.c
index 2600f74..2635727 100644
--- a/net/tcp.c
+++ b/net/tcp.c
@@ -36,7 +36,11 @@
#define TCP_SEND_RETRY 3
#define TCP_SEND_TIMEOUT 2000UL
#define TCP_RX_INACTIVE_TIMEOUT 30000UL
-#define TCP_RCV_WND_SIZE (PKTBUFSRX * TCP_MSS)
+#if PKTBUFSRX != 0
+ #define TCP_RCV_WND_SIZE (PKTBUFSRX * TCP_MSS)
+#else
+ #define TCP_RCV_WND_SIZE (4 * TCP_MSS)
+#endif
#define TCP_PACKET_OK 0
#define TCP_PACKET_DROP 1