[FS#1226] Kernel Warnings since Kernel 4.9 on WDR3600

[LEDE Bugs]

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

User who did this - Daniel Wandrei (cyablo) 

Attached to Project - LEDE Project
Summary - Kernel Warnings since Kernel 4.9 on WDR3600
Task Type - Bug Report
Category - Kernel
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Medium
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - I get Kernel warnings on my WDR3600 since I switched to Lede with 4.9 Kernel. The problems persists even in the latest Snapshot and only on one of my 3600's.

Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1486.874349] ------------[ cut here ]------------
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1486.879220] WARNING: CPU: 0 PID: 0 at backports-2017-11-01/net/mac80211/rx.c:629 ieee80211_rx_napi+0x254/0x924 [mac80211]
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1486.890392] Modules linked in: ath9k ath9k_common pppoe ppp_async ath9k_hw ath pppox ppp_generic nf_conntrack_ipv6 mac80211 iptable_nat ipt_REJECT ipt_MASQUERADE ftdi_sio cfg80211 xt_time xt_tcpudp xt_state xt_nat xt_multiport xt_mark xt_mac xt_limit xt_conntrack xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_CT usbserial slhc nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_conntrack_ipv4 nf_nat_ipv4 nf_nat nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack iptable_mangle iptable_filter ip_tables crc_ccitt compat cdc_acm ledtrig_usbport ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables x_tables ehci_platform ehci_hcd gpio_button_hotplug usbcore nls_base usb_common
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1486.957394] CPU: 0 PID: 0 Comm: swapper Not tainted 4.9.67 #0
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1486.963239] Stack : 805178fa 00000031 00000000 00000001 804a36d4 804a3347 80450938 00000000
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1486.971797]         80513a40 00000275 00000004 875c1618 00000000 800a9824 8045614c 804a0000
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1486.980352]         00000003 00000275 8045431c 87c09d34 00000000 800d991c 805178fa 0000006d
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1486.988896]         00000000 80231700 00000000 00000000 00000000 00000000 00000000 00000000
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1486.997441]         00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1487.005995]         ...
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1487.008486] Call Trace:
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1487.010999] [] show_stack+0x54/0x88
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1487.015440] [] __warn+0xe4/0x118
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1487.019616] [] warn_slowpath_null+0x1c/0x34
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1487.024870] [] ieee80211_rx_napi+0x254/0x924 [mac80211]
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1487.031150] [] ath_rx_tasklet+0xc98/0xce4 [ath9k]
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1487.036832] [] ath9k_tasklet+0x18c/0x214 [ath9k]
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1487.042430] [] tasklet_action+0x80/0xc8
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1487.047205] [] __do_softirq+0x250/0x298
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1487.052024] [] plat_irq_dispatch+0xd4/0x110
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1487.057160] [] handle_int+0x138/0x144
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1487.061788] [] r4k_wait_irqoff+0x18/0x20
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1487.066672] [] cpu_startup_entry+0x84/0xd0
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1487.071733] [] start_kernel+0x454/0x474
Thu Dec 14 08:09:59 2017 kern.warn kernel: [ 1487.076526] ---[ end trace cc5844dcef25dcc6 ]---

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1226