From 947c85bff0176c0bb7b6dce796ee32bd9fa868da Mon Sep 17 00:00:00 2001
From: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
Date: Fri, 22 May 2020 12:50:12 +0100
Subject: [PATCH] collectd: sqm_collectd: improve error handling

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
 utils/collectd/Makefile                           | 2 +-
 utils/collectd/files/exec-scripts/sqm_collectd.sh | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/utils/collectd/Makefile b/utils/collectd/Makefile
index e8a8bcfff..60bed8e91 100644
--- a/utils/collectd/Makefile
+++ b/utils/collectd/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=collectd
 PKG_VERSION:=5.11.0
-PKG_RELEASE:=5
+PKG_RELEASE:=6
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_URL:=https://collectd.org/files/ \
diff --git a/utils/collectd/files/exec-scripts/sqm_collectd.sh b/utils/collectd/files/exec-scripts/sqm_collectd.sh
index 66ba8df38..f158056e8 100755
--- a/utils/collectd/files/exec-scripts/sqm_collectd.sh
+++ b/utils/collectd/files/exec-scripts/sqm_collectd.sh
@@ -80,6 +80,8 @@ process_qdisc() {
 
 	ifc="$1"
 	jsn=$(tc -s -j qdisc show dev "$ifc")
+	[ $? ] || return
+
 	# strip leading & trailing []
 	jsn="${jsn#[}" ; jsn="${jsn%]}"