netdev - Re: [BUG] recursive lock in mwifiex_uninit

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Date:   Fri, 14 May 2021 15:57:37 +0200
From:   Maximilian Luz <luzmaximilian@...il.com>
To:     dave@...aar.me
Cc:     amitkarwar@...il.com, davem@...emloft.net, ganapathi017@...il.com,
        huxinming820@...il.com, johannes.berg@...el.com, kuba@...nel.org,
        kvalo@...eaurora.org, linux-kernel@...r.kernel.org,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        sharvari.harisangam@....com
Subject: Re: [BUG] recursive lock in mwifiex_uninit_sw

On 5/14/21 14:45 AM, dave@...aar.me wrote:
> A firmware crash of the Marvell 88W8897, which are spurious on Microsoft
> Surface devices, will unload/reset the device. However this can also 
> fail
> in more recent kernels, which can cause more problems since the driver
> does not unload. This causes programs trying to reach the network or
> networking devices to hang which in turn causes a reboot/poweroff to 
> hang.
> 
> This can happen on the following fedora rawhide kernels:
> - 5.12.0-0.rc8.20210423git7af08140979a.193.fc35.x86_64 [1]
> - 5.13.0-0.rc1.20210512git88b06399c9c7.15.fc35.x86_64 [2]
> 
> The latter seems to be more consistent in triggering this behaviour
> (and crashing the firmware). If someone can give me some pointers
> I would gladly help and debug this.

I believe the same issue (with slightly different symptoms) is also
reported in

   https://lore.kernel.org/linux-wireless/98392296-40ee-6300-369c-32e16cff3725@gmail.com/

See also

   https://lore.kernel.org/linux-wireless/522833b9-08c1-f470-a328-0e7419e86617@gmail.com/

for more details.

Regards,
Max