From 44f990144b2db99a87d12ade403a3222abf7d231 Mon Sep 17 00:00:00 2001
From: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Date: Tue, 9 Feb 2016 10:48:04 +0200
Subject: [PATCH] cc2520: Ignore received bogus packets silently

Instead of return 0 if there is an error, return
a value < 0 so that caller caller of cc2520_read()
can reject packet right away.

Change-Id: I99808db6aa692cf4415f630193d35e51d4bc3144
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
---
 drivers/802.15.4/cc2520.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/802.15.4/cc2520.c b/drivers/802.15.4/cc2520.c
index a030be8b958..ad7858a58b0 100644
--- a/drivers/802.15.4/cc2520.c
+++ b/drivers/802.15.4/cc2520.c
@@ -841,7 +841,7 @@ static int cc2520_read(void *buf, unsigned short bufsize)
 	}
 
 	if (!cc2520_pending_packet()) {
-		return 0;
+		return -EAGAIN;
 	}
 
 	cc2520_packets_read++;
@@ -893,7 +893,7 @@ error:
 	print_errors();
 
 	flushrx();
-	return 0;
+	return -EINVAL;
 }
 
 static void read_packet(void)