(please be noted we reported "[wifi] fb5a521416: hwsim.ap_wmm_uapsd.fail" on https://lore.kernel.org/all/20220616141324.GE25633@xsang-OptiPlex-9020/ now we noticed the commit is merged into linux-next/master, and the issue still exists. report again FYI) Greeting, FYI, we noticed the following commit (built with gcc-11): commit: bfd8403adddd09f32033a14bf25be398291e7881 ("wifi: mac80211: reorg some iface data structs for MLD") https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master in testcase: hwsim version: hwsim-x86_64-717e5d7-1_20220525 with following parameters: test: group-03 ucode: 0x21 on test machine: 8 threads 1 sockets Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz with 16G memory 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 2022-07-04 13:04:42 ./run-tests.py ap_wmm_uapsd 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_wmm_uapsd 1/1 Test: AP with U-APSD advertisement Starting AP wlan3 Connect STA wlan0 to AP dev1->dev2 unicast data delivery failed Traceback (most recent call last): File "/lkp/benchmarks/hwsim/tests/hwsim/./run-tests.py", line 534, in main t(dev, apdev) File "/lkp/benchmarks/hwsim/tests/hwsim/test_ap_params.py", line 876, in test_ap_wmm_uapsd hwsim_utils.test_connectivity(dev[0], hapd) File "/lkp/benchmarks/hwsim/tests/hwsim/hwsim_utils.py", line 195, in test_connectivity raise Exception(last_err) Exception: dev1->dev2 unicast data delivery failed FAIL ap_wmm_uapsd 5.262111 2022-07-04 13:04:48.064412 passed 0 test case(s) skipped 0 test case(s) failed tests: ap_wmm_uapsd To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests sudo bin/lkp install job.yaml # job file is attached in this email bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run sudo bin/lkp run generated-yaml-file # if come across any failure that blocks the test, # please remove ~/.lkp and /lkp dir to run from a clean state. -- 0-DAY CI Kernel Test Service https://01.org/lkp