From 4c53449fa3b1091ff69cfbd86b26380101fd4f0f Mon Sep 17 00:00:00 2001
From: "Kim B. Heino" <b@bbbs.net>
Date: Fri, 9 Oct 2020 14:51:31 +0300
Subject: [PATCH] irqstats: fix iqrstats on Raspberry Pi (partial revert for
 5190244c)

Raspberry Pi has line "FIQ:              usb_fiq" in /proc/interrupts.
"VALUE=$((VALUE + VAL))" results "Illegal number" in dash (Raspberry Pi)
"VALUE=$((VALUE + $VAL))" works in dash, bash and busybox (OpenWrt).
---
 plugins/irqstats | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plugins/irqstats b/plugins/irqstats
index 47c69d6..13c3fb3 100644
--- a/plugins/irqstats
+++ b/plugins/irqstats
@@ -29,7 +29,7 @@ fetch_irqstats() {
     VALUE=0
     for VAL in $VALS;
     do
-      VALUE=$((VALUE + VAL))
+      VALUE=$((VALUE + $VAL))
     done
     echo "i$ID.value $VALUE"
   done