From 7d690c34bb283f423e818bb536512f203b8dc1e7 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 6773f99d9053..5f39698ea728 100644
--- a/drivers/encx24j600/encx24j600.c
+++ b/drivers/encx24j600/encx24j600.c
@@ -357,7 +357,10 @@ static int _recv(netdev_t *netdev, void *buf, size_t len, void *info)
         }
         /* 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);