[Bug 275255] iwlwifi: panic after iwlwifi0: lkpi_iv_newstate: error -5 during state transition 5 (RUN) -> 0 (INIT) (8xxx/9xxx chipsets)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275255

--- Comment #20 from Bakul Shah <bakul@iitbombay.org> ---
iwlwifi0@pci0:0:7:0:    class=0x028000 rev=0x29 hdr=0x00 vendor=0x8086
device=0x2526 subvendor=0x8086 subdevice=0x0014
    vendor     = 'Intel Corporation'
    device     = 'Wi-Fi 5(802.11ac) Wireless-AC 9x6x [Thunder Peak]'
    class      = network


iwlwifi0: Detected Intel(R) Wireless-AC 9260 160MHz, REV=0x321
iwlwifi0: base HW address: 8c:a9:82:fc:e8:9c, OTP minor version: 0x4
iwlwifi0: <iwlwifi> mem 0xc1034000-0xc1037fff at device 7.0 on pci0
iwlwifi0: Detected crf-id 0x2816, cnv-id 0x1000200 wfpm id 0x80000000
iwlwifi0: PCI dev 2526/0014, rev=0x321, rfid=0x105110
iwlwifi0: successfully loaded firmware image
'iwlwifi-9260-th-b0-jf-b0-46.ucode'

Note that on reboot the device seems to be in some odd state and I see messages
like

iwlwifi0: loaded firmware version 46.ff18e32a.0 9260-th-b0-jf-b0-46.ucode
op_mode iwlmvm
iwlwifi0: Detected Intel(R) Wireless-AC 9260 160MHz, REV=0x321
iwlwifi0: Failed to load firmware chunk!
iwlwifi0: iwlwifi transaction failed, dumping registers
iwlwifi0: iwlwifi device config registers:
iwlwifi 0000:00:07.0: 0000   86 80 26 25 07 04 10 00 29 00 80 02 00 00 00 00 
|..
...
iwlwifi0: Could not load the [0] uCode section
iwlwifi0: Failed to start INIT ucode: -60
iwlwifi0: WRT: Collecting data: ini trigger 13 fired (delay=0ms).
iwlwifi0: Not valid error log pointer 0x00000000 for Init uCode
iwlwifi0: IML/ROM dump:
...
iwlwifi0: 0xE27C6CB6 | FSEQ_CLASS_TP_VERSION
iwlwifi0: Failed to run INIT ucode: -60
iwlwifi0: retry init count 0
iwlwifi0: Detected Intel(R) Wireless-AC 9260 160MHz, REV=0x321

But it seems to work fine (at least with my manula ifconfig ... create...).
Haven't tried enabling it from rc.conf yet.

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