Continuous crashes, unable to switch to another network on kubuntu 15.04 (kernel 3.19.4)

[Grief]

Device is TP-LINK Archer T4U
The crash in dmesg:

[   98.202496] usbcore: registered new interface driver rtl8812au
[  102.909242] ------------[ cut here ]------------
[  102.909255] WARNING: CPU: 3 PID: 49 at /home/kernel/COD/linux/net/wireless/sme.c:857 __cfg80211_disconnected+0x356/0x370 [cfg80211]()
[  102.909256] Modules linked in: 8812au(OE) cfg80211 rfcomm bnep joydev xpad ff_memless fglrx(POE) intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul amd_iommu_v2 ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_codec_ca0132 serio_raw snd_hda_codec_hdmi btusb snd_soc_rt5640 snd_soc_rl6231 snd_hda_intel snd_hda_controller snd_soc_core bluetooth snd_hda_codec snd_hwdep snd_compress snd_pcm_dmaengine snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_pcm lpc_ich snd_seq_device snd_timer snd mei_me i2c_hid shpchp mei soundcore snd_soc_sst_acpi dw_dmac 8250_dw 8250_fintek i2c_designware_platform dw_dmac_core i2c_designware_core mac_hid acpi_pad spi_pxa2xx_platform intel_smartconnect parport_pc
[  102.909278]  ppdev lp parport autofs4 hid_generic usbhid i2c_algo_bit ttm uas e1000e drm_kms_helper mxm_wmi ahci alx ptp libahci psmouse mdio hid usb_storage wmi sdhci_acpi drm pps_core video sdhci
[  102.909287] CPU: 3 PID: 49 Comm: kworker/u8:1 Tainted: P           OE  3.19.4-031904-generic #201504131440
[  102.909288] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z97 Professional, BIOS P1.80 12/17/2014
[  102.909293] Workqueue: cfg80211 cfg80211_event_work [cfg80211]
[  102.909294]  0000000000000359 ffff880224f8bc58 ffffffff817c6cd7 0000000000000007
[  102.909295]  0000000000000000 ffff880224f8bc98 ffffffff81076e17 ffff880224d6ad18
[  102.909296]  0000000000000000 ffff8800c4b3bc48 0000000000000000 0000000000000001
[  102.909297] Call Trace:
[  102.909301]  [<ffffffff817c6cd7>] dump_stack+0x45/0x57
[  102.909304]  [<ffffffff81076e17>] warn_slowpath_common+0x97/0xe0
[  102.909305]  [<ffffffff81076e7a>] warn_slowpath_null+0x1a/0x20
[  102.909311]  [<ffffffffc09ad3c6>] __cfg80211_disconnected+0x356/0x370 [cfg80211]
[  102.909315]  [<ffffffffc098561f>] cfg80211_process_wdev_events+0x1af/0x1e0 [cfg80211]
[  102.909318]  [<ffffffff8101358e>] ? __switch_to+0xbe/0x5b0
[  102.909322]  [<ffffffffc0985688>] cfg80211_process_rdev_events+0x38/0x70 [cfg80211]
[  102.909325]  [<ffffffffc09802e2>] cfg80211_event_work+0x22/0x30 [cfg80211]
[  102.909328]  [<ffffffff8108f6b4>] process_one_work+0x144/0x470
[  102.909329]  [<ffffffff810900fe>] worker_thread+0x11e/0x450
[  102.909331]  [<ffffffff8108ffe0>] ? create_worker+0x1f0/0x1f0
[  102.909332]  [<ffffffff81095e29>] kthread+0xc9/0xe0
[  102.909334]  [<ffffffff81095d60>] ? flush_kthread_worker+0x90/0x90
[  102.909336]  [<ffffffff817d3718>] ret_from_fork+0x58/0x90
[  102.909337]  [<ffffffff81095d60>] ? flush_kthread_worker+0x90/0x90
[  102.909338] ---[ end trace c1f7328ac84d688f ]---
[  120.404000] RTL871X: set ssid [Grief-Wi-Fi-2.4] fw_state=0x00000008
[  120.586726] RTL871X: start auth
[  120.590720] RTL871X: auth success, start assoc
[  120.595838] RTL871X: assoc success
[  120.595893] cfg80211: Calling CRDA for country: US
[  120.596419] UpdateHalRAMask8812A => mac_id:0, networkType:0x0b, mask:0x0fffffff
         ==> rssi_level:0, rate_bitmap:0x0f8ff005
[  120.598147] cfg80211: Regulatory domain changed to country: US
[  120.598149] cfg80211:  DFS Master region: FCC
[  120.598149] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp),
[  120.598150] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm), (N/A
[  120.598151] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm), (N/A
[  120.598152] cfg80211:   (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (0 s
[  120.598153] cfg80211:   (5490000 KHz - 5600000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (0 s
[  120.598153] cfg80211:   (5650000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (0 s
[  120.598154] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm), (N/A
[  120.598155] cfg80211:   (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 4000 mBm), (N/A
[  120.601062] RTL871X: send eapol packet
[  120.606238] RTL871X: send eapol packet
[  120.606821] RTL871X: set pairwise key to hw: alg:4(WEP40-1 WEP104-5 TKIP-2 AES-4) camid:4
[  120.606822] RTL871X: set group key to hw: alg:4(WEP40-1 WEP104-5 TKIP-2 AES-4) keyid:1
[  122.410846] UpdateHalRAMask8812A => mac_id:0, networkType:0x0b, mask:0x0fffffff
         ==> rssi_level:2, rate_bitmap:0x0f8ff000