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Date:   Wed, 12 Apr 2023 19:07:43 +0200
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     qianfan <qianfanguijin@163.com>
Cc:     linux-usb@vger.kernel.org, Johan Hovold <johan@kernel.org>,
        Bin Liu <b-liu@ti.com>
Subject: Re: BUG: linux 5.15.0 hang on usb_wwan_indat_callback
Message-ID: <2023041257-campfire-squeamish-75a4@gregkh>
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On Wed, Apr 12, 2023 at 07:54:28PM +0800, qianfan wrote:
> Hi:
> 
> The linux system maybe hang in usb_wwan_indat_callback when the usb modem
> sudden disconnected. This problem has a very small probability and can not
> make it repeat easy.
> 
> hardware: allwinner R40 with 4 cortex-a7
> software: linux 5.15.0

5.15.0 is _VERY_ old, sorry.  Please try using a modern kernel release,
we can not do anything about old kernels like this.

Does this still happen on the latest 6.2 release, or the latest 6.3-rc
release?

thanks,

greg k-h