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Message-ID: <de43c7e1-7e8c-bdbe-f59e-7632c21da24a@candelatech.com>
Date: Mon, 15 Apr 2024 13:37:54 -0700
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Subject: Re: 6.9.0-rc2+ kernel hangs on boot (bisected, maybe LED related)
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To: Lee Jones <lee@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>, linux-leds@vger.kernel.org,
 Johannes Berg <johannes@sipsolutions.net>
References: <30f757e3-73c5-5473-c1f8-328bab98fd7d@candelatech.com>
 <30819e01-43ce-638f-0cc6-067d6a8d03c7@candelatech.com>
 <89a9eec3-337f-3c9f-6bbe-00a26a15287c@candelatech.com>
 <20240411070718.GD6194@google.com>
From: Ben Greear <greearb@candelatech.com>
Organization: Candela Technologies
In-Reply-To: <20240411070718.GD6194@google.com>
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On 4/11/24 00:07, Lee Jones wrote:
> On Wed, 03 Apr 2024, Ben Greear wrote:
> 
>> On 4/2/24 10:38, Ben Greear wrote:
>>> On 4/2/24 09:37, Ben Greear wrote:
>>>> Hello,
>>>>
>>>> Sometime between rc1 and today's rc2, my system quit booting.
>>>> I'm not seeing any splats, it just stops.  Evidently before
>>>> sysrq is enabled.
>>>>
>>>> [  OK  ] Started Flush Journal to Persistent Storage.
>>>> [  OK  ] Started udev Coldplug all Devices.
>>>>            Starting udev Wait for Complete Device Initialization...
>>>> [  OK  ] Listening on Load/Save RF …itch Status /dev/rfkill Watch.
>>>> [  OK  ] Created slice system-lvm2\x2dpvscan.slice.
>>>>            Starting LVM2 PV scan on device 8:19...
>>>>            Starting LVM2 PV scan on device 8:3...
>>>> [  OK  ] Started Device-mapper event daemon.
>>>> iwlwifi 0000:04:00.0: WRT: Invalid buffer destination: 0
>>>> sysrq: This sysrq operation is disabled.
>>>>
>>>> I can start a bisect, but in case anyone knows the answer already, please let me know.
>>>>
>>>> Thanks,
>>>> Ben
>>>>
>>>
>>> So, deadlock I guess....
> 
> Does this help you in any way?
> 
> https://lore.kernel.org/all/bbcdbc1b-44bc-4cf8-86ef-6e6af2b009c3@gmail.com/
> 
Hello Lee,

I cannot see how that patch above would fix my issues since I am not using that driver,
but possibly some similar change needs to be made to iwlwifi.

Johannes, you had another suggestion: changing iwlwifi's request_module() to request_module_nowait() in
iwl_req_fw_callback()

Is that still best thing to try in your opinion?

Thanks,
Ben

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com