From 0d2d02da81284fa9a67e829844218b1a86ebccc4 Mon Sep 17 00:00:00 2001
From: Michael Tremer <michael.tremer@ipfire.org>
Date: Wed, 7 Jun 2017 18:48:40 +0200
Subject: [PATCH] device: Return speed only if a valid (positive) value

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---
 src/functions/functions.device | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/functions/functions.device b/src/functions/functions.device
index 5500dc87..008891d4 100644
--- a/src/functions/functions.device
+++ b/src/functions/functions.device
@@ -860,7 +860,12 @@ device_get_tx_errors() {
 device_get_speed() {
 	local device=${1}
 
-	__device_get_file ${device} speed
+	local speed=$(__device_get_file ${device} speed)
+
+	# Don't return anything for negative values
+	[ ${speed} -lt 0 ] && return ${EXIT_ERROR}
+
+	print "${speed}"
 }
 
 device_get_duplex() {
-- 
2.47.3