linux-kernel - Re: [BUG] iwlwifi: card unusable after firmware crash

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Date:   Tue, 8 Dec 2020 16:27:46 +0000
From:   "Coelho, Luciano" <luciano.coelho@...el.com>
To:     "Goodstein, Mordechay" <mordechay.goodstein@...el.com>,
        "Berg, Johannes" <johannes.berg@...el.com>,
        "rsalvaterra@...il.com" <rsalvaterra@...il.com>
CC:     "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kuba@...nel.org" <kuba@...nel.org>
Subject: Re: [BUG] iwlwifi: card unusable after firmware crash

On Tue, 2020-12-08 at 11:27 +0000, Rui Salvaterra wrote:
> Hi, everyone,
> 
> I'm running Linux 5.10-rc7 with this firmware/hardware:
> 
> [    1.431878] iwlwifi 0000:02:00.0: loaded firmware version
> 29.198743027.0 7265D-29.ucode op_mode iwlmvm
> [    1.431899] iwlwifi 0000:02:00.0: Detected Intel(R) Dual Band
> Wireless AC 3165, REV=0x210
> 
> Most of the time, after disabling/enabling Wi-Fi (or, say, rebooting
> the router), the card dies and only comes back after reboot. This is
> the relevant dmesg output:
> 
> [ 3174.003910] iwlwifi 0000:02:00.0: RF_KILL bit toggled to disable radio.
> [ 3174.003913] iwlwifi 0000:02:00.0: reporting RF_KILL (radio disabled)

It looks like your machine is reporting RF-Kill to the WiFi device.

There seems to be some sort of race there that is causing us to still
try to communicate with the device (and thus you see the transaction
failed dump), but that will obviously fail when RF-Kill is enabled.

--
Luca.