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At first, I installed a 4.15 linux-kernel in my ubuntu 16.04 computer. After removing it, the wireless usb nic can't be loaded currently. i try to find what happened using the command demsg. The information is displayed:

[344212.057969] usb 1-1: USB disconnect, device number 12

[344373.509732] usb 1-2: new high-speed USB device number 13 using xhci_hcd

[344373.675255] usb 1-2: New USB device found, idVendor=148f, idProduct=5572

[344373.675261] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3

[344373.675265] usb 1-2: Product: 802.11 n WLAN

[344373.675269] usb 1-2: Manufacturer: Ralink

[344373.675273] usb 1-2: SerialNumber: 1.0

[344373.805838] usb 1-2: reset high-speed USB device number 13 using xhci_hcd

[344373.964032]  (null): rt2x00_set_rt: Info - RT chipset 5592, rev 0222 detected

[344373.975732]  (null): rt2x00_set_rf: Info - RF chipset 000f detected

[344373.975980] WARNING: CPU: 3 PID: 10276 at /home/jssec/Downloads/backports-5.0-rc6-1/net/wireless/core.c:864 wiphy_register+0x8f6/0x910 [cfg80211]

[344373.975982] Modules linked in: rt2800usb rt2x00usb rt2800lib rt2x00lib hid_generic usbhid hid binfmt_misc uas usb_storage 88x2bu(OE) rfcomm xt_multiport iptable_filter ip_tables x_tables bnep nls_iso8859_1 arc4 snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm dell_wmi intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq dcdbas snd_seq_device aesni_intel snd_timer aes_x86_64 crypto_simd glue_helper btusb cryptd dell_smbios_wmi btrtl intel_cstate intel_rapl_perf btbcm ath10k_pci(OE) dell_smbios btintel ath10k_core(OE) ath(OE) bluetooth mac80211(OE) dell_wmi_descriptor sparse_keymap intel_pch_thermal

[344373.976061]  snd cfg80211(OE) mei_me compat(OE) soundcore wmi_bmof ecdh_generic mei shpchp tpm_crb acpi_pad mac_hid parport_pc ppdev lp parport autofs4 i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ahci r8169 drm mii libahci wmi video

[344373.976103] CPU: 3 PID: 10276 Comm: kworker/3:1 Tainted: G        W  OE    4.15.0-29-generic #31~16.04.1-Ubuntu

[344373.976105] Hardware name: Dell Inc. OptiPlex 3060/0NV0M7, BIOS 1.2.17 10/09/2018

[344373.976113] Workqueue: usb_hub_wq hub_event

[344373.976138] RIP: 0010:wiphy_register+0x8f6/0x910 [cfg80211]

[344373.976141] RSP: 0018:ffffb4ad4930f6f0 EFLAGS: 00010246

[344373.976144] RAX: 0000000000000000 RBX: ffff9bd85e19c300 RCX: 0000000000001388

[344373.976147] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff9bd85e19c300

[344373.976149] RBP: ffffb4ad4930f760 R08: 0000000000000002 R09: 0000000000000003

[344373.976151] R10: ffffb4ad4930f778 R11: 0000000000000008 R12: 0000000000000040

[344373.976153] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000

[344373.976156] FS:  0000000000000000(0000) GS:ffff9bd87e4c0000(0000) knlGS:0000000000000000

[344373.976159] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033

[344373.976162] CR2: 00000000026951a8 CR3: 0000000136e0a002 CR4: 00000000003606e0

[344373.976164] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

[344373.976166] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

[344373.976168] Call Trace:

[344373.976178]  ? rt2x00usb_vendor_req_buff_lock+0x70/0x250 [rt2x00usb]

[344373.976183]  ? _cond_resched+0x1a/0x50

[344373.976189]  ? __kmalloc+0x1dd/0x220

[344373.976218]  ieee80211_register_hw+0x4bb/0xcb0 [mac80211]

[344373.976241]  ? ieee80211_register_hw+0x4bb/0xcb0 [mac80211]

[344373.976245]  ? _cond_resched+0x1a/0x50

[344373.976252]  ? __kfifo_alloc+0x4d/0x90

[344373.976260]  rt2x00lib_probe_hw+0x346/0x420 [rt2x00lib]

[344373.976268]  rt2x00lib_probe_dev+0x314/0x3b0 [rt2x00lib]

[344373.976272]  ? devm_kmalloc+0x49/0x60

[344373.976278]  rt2x00usb_probe+0x1d2/0xc30 [rt2x00usb]

[344373.976284]  rt2800usb_probe+0x15/0x20 [rt2800usb]

[344373.976289]  usb_probe_interface+0x158/0x2f0

[344373.976295]  driver_probe_device+0x2bc/0x4a0

[344373.976300]  __device_attach_driver+0x8f/0x100

[344373.976305]  ? __driver_attach+0xf0/0xf0

[344373.976309]  bus_for_each_drv+0x69/0xb0

[344373.976315]  __device_attach+0xdd/0x160

[344373.976320]  device_initial_probe+0x13/0x20

[344373.976324]  bus_probe_device+0x95/0xa0

[344373.976329]  device_add+0x400/0x670

[344373.976336]  usb_set_configuration+0x512/0x880

[344373.976343]  generic_probe+0x2e/0x80

[344373.976346]  usb_probe_device+0x34/0x70

[344373.976351]  driver_probe_device+0x2bc/0x4a0

[344373.976356]  __device_attach_driver+0x8f/0x100

[344373.976361]  ? __driver_attach+0xf0/0xf0

[344373.976365]  bus_for_each_drv+0x69/0xb0

[344373.976370]  __device_attach+0xdd/0x160

[344373.976375]  device_initial_probe+0x13/0x20

[344373.976379]  bus_probe_device+0x95/0xa0

[344373.976383]  device_add+0x400/0x670

[344373.976388]  ? add_device_randomness+0xca/0x1c0

[344373.976392]  usb_new_device+0x26f/0x4b0

[344373.976398]  hub_port_connect+0x582/0xa80

[344373.976403]  hub_event+0x72d/0xb10

[344373.976408]  ? __switch_to_asm+0x34/0x70

[344373.976414]  ? __switch_to+0xb2/0x500

[344373.976420]  process_one_work+0x14d/0x410

[344373.976424]  worker_thread+0x4b/0x460

[344373.976431]  kthread+0x105/0x140

[344373.976434]  ? process_one_work+0x410/0x410

[344373.976440]  ? kthread_associate_blkcg+0xa0/0xa0

[344373.976444]  ret_from_fork+0x35/0x40

[344373.976447] Code: 0f 0b b8 ea ff ff ff e9 0b f8 ff ff 0f 0b b8 ea ff ff ff e9 ff f7 ff ff 48 8b bb 38 09 00 00 e9 80 fe ff ff 0f 0b e9 72 ff ff ff <0f> 0b b8 ea ff ff ff e9 e0 f7 ff ff 0f 1f 40 00 66 2e 0f 1f 84 

[344373.976524] ---[ end trace 7e14ba6021f8ac57 ]---

[344373.976529]  (null): rt2x00lib_probe_dev: Error - Failed to initialize hw

[344373.976562] rt2800usb: probe of 1-2:1.0 failed with error -22

I guess that the path of module loading is error. but i don't know where can be modify. I’m looking forward to your help!