More detail about the kernel warning:
[1175168.236504] CFG80211-ERROR) wl_is_linkdown : Link down Reason : WLC_E_LINK
[1175168.243614] CFG80211-ERROR) wl_notify_connect_status : link down if wlan0 may call cfg80211_disconnected. event : 16, reason=2 from 1c:b9:c4:a9:77:b8
[1175168.270888] CFG80211-ERROR) wl_cfg80211_connect : Connectting with1c:b9:c4:a9:65:d8 channel (1) ssid "gd", len (2)
[1175168.324286] CFG80211-ERROR) wl_notify_connect_status : wl_bss_connect_done succeeded with 1c:b9:c4:a9:65:d8
[1175168.335832] cfg80211: World regulatory domain updated:
[1175168.337710] SCV_DEBUG, wifi power_set, wldev_ioctl 67, set:0
[1175168.347151] cfg80211: DFS Master region: unset
[1175168.351777] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[1175168.358619] CFG80211-ERROR) wl_bss_connect_done : Report connect result - connection succeeded
[1175168.370575] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[1175168.378794] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[1175168.387030] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A)
[1175168.395221] cfg80211: (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A)
[1175168.403599] CFG80211-ERROR) wl_notify_connect_status : wl_bss_connect_done succeeded with 1c:b9:c4:a9:65:d8
[1175168.414793] cfg80211: (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s)
[1175168.424449] cfg80211: (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s)
[1175168.432729] cfg80211: (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
[1175168.440911] cfg80211: (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A)
[1175168.449359] ------------[ cut here ]------------
[1175168.454153] WARNING: at ffffffc000b3c3dc [verbose debug info unavailable]
[1175168.461104] Modules linked in: fuse bcmdhd pci_tegra bluedroid_pm
[1175168.469078] CPU: 5 PID: 22116 Comm: kworker/u12:1 Tainted: G W 4.4.38+ #2
[1175168.477154] Hardware name: quill (DT)
[1175168.480993] Workqueue: cfg80211 cfg80211_event_work
[1175168.486046] task: ffffffc11f6fd780 ti: ffffffc04f298000 task.ti: ffffffc04f298000
[1175168.493697] PC is at __cfg80211_connect_result+0x220/0x254
[1175168.499353] LR is at __cfg80211_connect_result+0xb8/0x254
[1175168.504920] pc : [<ffffffc000b3c3dc>] lr : [<ffffffc000b3c274>] pstate: 40000045
[1175168.512481] sp : ffffffc04f29bc90
[1175168.515968] x29: ffffffc04f29bca0 x28: 0000000000000000
[1175168.521478] x27: 0000000000000000 x26: ffffffc0013ce6f8
[1175168.526989] x25: ffffffc09dac0218 x24: ffffffc000d40854
[1175168.532505] x23: ffffffc1e1db3eb0 x22: ffffffc09dac0218
[1175168.538014] x21: 0000000000000000 x20: 0000000000000000
[1175168.543523] x19: ffffffc1e1db3e00 x18: 0000000000152f07
[1175168.549031] x17: 0000007fb1a21f68 x16: ffffffc000b67a60
[1175168.554542] x15: 00000000fa83b2da x14: 0000000000000000
[1175168.560054] x13: 00000001163d000d x12: e746060400000000
[1175168.565568] x11: 0000000000000000 x10: 0000000000000001
[1175168.571082] x9 : 0000000000000010 x8 : ffffffbffc0b0c38
[1175168.576597] x7 : 0000000000000001 x6 : 0000000000000002
[1175168.582178] x5 : 00000000fffffffe x4 : 0000000000000000
[1175168.587803] x3 : ffffffc001409700 x2 : 0000000000000000
[1175168.593428] x1 : 0000000000000000 x0 : 0000000000000000
[1175168.608525] ---[ end trace 8177347c0d39a7ab ]---
[1175168.613400] Call trace:
[1175168.616133] [<ffffffc000b3c3dc>] __cfg80211_connect_result+0x220/0x254
[1175168.622939] [<ffffffc000b16634>] cfg80211_process_wdev_events+0x148/0x1a8
[1175168.629961] [<ffffffc000b166c4>] cfg80211_process_rdev_events+0x30/0x6c
[1175168.636818] [<ffffffc000b11238>] cfg80211_event_work+0x1c/0x28
[1175168.642935] [<ffffffc0000bc2d0>] process_one_work+0x154/0x434
[1175168.648901] [<ffffffc0000bc6e4>] worker_thread+0x134/0x40c
[1175168.654639] [<ffffffc0000c1f30>] kthread+0xe0/0xf4
[1175168.659708] [<ffffffc000084f90>] ret_from_fork+0x10/0x40
[1175168.686022] cfg80211: World regulatory domain updated:
[1175168.691689] cfg80211: DFS Master region: unset
[1175168.696413] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[1175168.706754] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[1175168.715172] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[1175168.723488] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A)
[1175168.731803] cfg80211: (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A)
[1175168.741606] cfg80211: (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s)
[1175168.751455] cfg80211: (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s)
[1175168.759786] cfg80211: (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
[1175168.768020] cfg80211: (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A)
[1175171.157640] IPVS: Creating netns size=1424 id=15
[1175194.450785] dhd_ndo_remove_ip: ndo ip addr remove failed, retcode = -23
[1175194.458987] dhd_inet6_work_handler: Removing host ip for NDO failed -23
The warning is from
$addr2line ffffffc000b3c3dc -e sources/kernel/kernel-4.4/output/vmlinux
jetpack/64_TX2/Linux_for_Tegra/sources/kernel/kernel-4.4/net/wireless/sme.c:714
if (status != WLAN_STATUS_SUCCESS) {
kzfree(wdev->connect_keys);
wdev->connect_keys = NULL;
wdev->ssid_len = 0;
if (bss) {
cfg80211_unhold_bss(bss_from_pub(bss));
cfg80211_put_bss(wdev->wiphy, bss);
}
cfg80211_sme_free(wdev);
return;
}
//the warning was because of the following line, line 714
if (WARN_ON(!bss))
return;