FYI, we noticed the following commit: commit: 76f44b4c0a9337af22827d78de4f2b8fd5328489 ("mac80211: Remove invalid flag operations in mesh TSF synchronization") https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master in testcase: hwsim with following parameters: group: hwsim-06 on test machine: 8 threads Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz with 8G memory caused below changes: 2016-12-18 23:20:41 ./run-tests.py mesh_missing_mic 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 mesh_missing_mic 1/1 Test: Secure mesh network and missing MIC MGMT-RX timeout Traceback (most recent call last): File "./run-tests.py", line 449, in main t(dev, apdev) File "/lkp/benchmarks/hwsim/tests/hwsim/test_wpas_mesh.py", line 1582, in test_mesh_missing_mic raise Exception("MGMT-RX timeout") Exception: MGMT-RX timeout FAIL mesh_missing_mic 5.18796 2016-12-18 23:20:46.752155 passed 0 test case(s) skipped 0 test case(s) failed tests: mesh_missing_mic To reproduce: git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml Thanks, Xiaolong