From 419dd50255fba6a41e886f955167e4dbf2a8f997 Mon Sep 17 00:00:00 2001
From: "Sergio R. Caprile" <scaprile@users.noreply.github.com>
Date: Tue, 6 Sep 2022 16:53:26 -0300
Subject: [PATCH] Fix Ethernet buffer size

1500 bytes is payload size, which is OK for tx. On the rx side, a full 802.1Q-tagged frame size is 1522 bytes, without the 4-byte CRC = 1518 bytes (1514 for non-VLAN-tagged frames).
---
 mip/mip.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mip/mip.c b/mip/mip.c
index 2fefc28e..38279d6b 100644
--- a/mip/mip.c
+++ b/mip/mip.c
@@ -717,7 +717,7 @@ void mip_init(struct mg_mgr *mgr, struct mip_cfg *ipcfg,
   if (driver->init && !driver->init(ipcfg->mac, driver_data)) {
     MG_ERROR(("driver init failed"));
   } else {
-    size_t maxpktsize = 1500, qlen = driver->setrx ? 1024 * 16 : 0;
+    size_t maxpktsize = 1518, qlen = driver->setrx ? 1024 * 16 : 0;
     struct mip_if *ifp =
         (struct mip_if *) calloc(1, sizeof(*ifp) + 2 * maxpktsize + qlen);
     memcpy(ifp->mac, ipcfg->mac, sizeof(ifp->mac));