[FS#1056] nonzero /proc/interrupts ERR count

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - Wenri (wenri) 

Attached to Project - LEDE Project
Summary - nonzero /proc/interrupts ERR count
Task Type - Bug Report
Category - Kernel
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Medium
Priority - Very Low
Reported Version - lede-17.01
Due in Version - Undecided
Due Date - Undecided
Details - I have two TL-WDR4310: router A and router B.

router A is running 17.01.2, uptime: up 20 days, load average: 0.07, 0.01, 0.00
cat /proc/interrupts:

           CPU0       
  3:       2091      MIPS   3  ehci_hcd:usb1
  4:   69511445      MIPS   4  eth0
  7:  196245520      MIPS   7  timer
 11:         26      MISC  serial
 40:   18620983  AR724X PCI   ath9k
 47:  314132388     dummy  ath9k
ERR:      50215


router B is running 17.01.3, uptime: up 2 hours, load average: 0.00, 0.00, 0.00
cat /proc/interrupts:

           CPU0
  3:       1307      MIPS   3  ehci_hcd:usb1
  4:      66605      MIPS   4  eth0
  7:     527287      MIPS   7  timer
 11:         26      MISC  serial
 40:     419629  AR724X PCI   ath9k
 47:     574237     dummy  ath9k
ERR:         45


Both routers have extroot enabled on a 4G usb stick formatted to ext4.

I forgot if this nonzero ERR count exists in 17.01.1, but I am sure this ERR count doesn't exist long time ago (in CC and/or BB of OpenWrt).

However It seems nothing is broken now.

Best,
Wenri

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1056