From 6b76ead49c54b39256f92e42fe38de437d075bca Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Beno=C3=AEt=20Th=C3=A9baudeau?=
 <benoit.thebaudeau.dev@gmail.com>
Date: Tue, 14 Jul 2015 23:02:22 +0200
Subject: [PATCH] enc28j60: Prevent enc28j60_read() from running before init
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This is a precaution in case enc28j60-ip64-driver.c is skipped.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
---
 dev/enc28j60/enc28j60.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dev/enc28j60/enc28j60.c b/dev/enc28j60/enc28j60.c
index 2c0d5783d..60dded31a 100644
--- a/dev/enc28j60/enc28j60.c
+++ b/dev/enc28j60/enc28j60.c
@@ -589,6 +589,10 @@ enc28j60_read(uint8_t *buffer, uint16_t bufsize)
   uint8_t status[2];
   uint8_t length[2];
 
+  if(!initialized) {
+    return -1;
+  }
+
   err = 0;
 
   setregbank(EPKTCNT_BANK);