FYI, we noticed the following commit (built with gcc-7):

commit: 7ed389fe1b71968d854834410f21d4024cca9f0d ("cfg80211: Fix regulatory data is reset in case all phys have disconnected")
https://github.com/0day-ci/linux/commits/Orr-Mazor/cfg80211-Fix-regulatory-data-is-reset-in-case-all-phys-have-disconnected/20200117-035215

in testcase: hwsim
with following parameters:

	group: hwsim-00



on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 8G

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):




If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@intel.com>


2020-02-17 13:27:30 	./run-tests.py ap_acs_vht160_dfs --long
DEV: wlan0: 02:00:00:00:00:00
DEV: wlan1: 02:00:00:00:01:00
DEV: wlan2: 02:00:00:00:02:00
APDEV: wlan3
APDEV: wlan4
START ap_acs_vht160_dfs 1/1
Test: Automatic channel selection 160 MHz, HT scan, and DFS [long]
Starting AP wlan3
Removing BSS wlan3
Starting AP wlan3
Connect STA wlan0 to AP
wlan0: Country code not reset back to 00: is 98
Country code remains set - expect following test cases to fail
FAIL ap_acs_vht160_dfs 69.161831 2020-02-17 13:28:39.876805
passed 0 test case(s)
skipped 0 test case(s)
failed tests: ap_acs_vht160_dfs



To reproduce:

        # build kernel
	cd linux
	cp config-5.5.0-rc4-00726-g7ed389fe1b719 .config
	make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email



Thanks,
Rong Chen