From 727b4cac1c850ccd06d825e3c50dfa18a81c33c7 Mon Sep 17 00:00:00 2001
From: Marian Buschsieweke <marian.buschsieweke@ovgu.de>
Date: Fri, 16 Nov 2018 13:24:35 +0100
Subject: [PATCH] drivers/encx24j600: Implemented missing drop case

The netdev_driver_t::recv implementation of the encx24j600 does not provide the
drop feature. This commit adds it.

Fixes: #10410
---
 drivers/encx24j600/encx24j600.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/encx24j600/encx24j600.c b/drivers/encx24j600/encx24j600.c
index 4f8cd3818c3a..5f8fe61b2e1a 100644
--- a/drivers/encx24j600/encx24j600.c
+++ b/drivers/encx24j600/encx24j600.c
@@ -373,7 +373,10 @@ static int _recv(netdev_t *netdev, void *buf, size_t len, void *info)
 #endif
         /* read packet (without 4 bytes checksum) */
         sram_op(dev, ENC_RRXDATA, 0xFFFF, buf, payload_len);
+    }
 
+    /* Frame was retrieved or drop was requested --> remove it from buffer */
+    if (buf || (len > 0)) {
         /* decrement available packet count */
         cmd(dev, ENC_SETPKTDEC);