Re: Kernel panic in cdc_acm / acm_tty_hangup / tty_port_hangup

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On Tue, Nov 29, 2011 at 11:54 AM, Thilo-Alexander Ginkel
<thilo@xxxxxxxxxx> wrote:
> Hi there,
>
> over the last months I have been experiencing kernel panics from time
> to time on suspend / resume of my Lenovo T420s laptop. Reading the
> backtrace it seems that my wireless modem is involved. As the machine
> locks up completely, I have to manually copy the backtrace, so please
> excuse any possible typos:
>
>  ...
>  page_fault
>  ? __ticket_spin_lock
>  default_spin_lock_flags
>  _raw_spin_lock_irqsave
>  tty_port_hangup
>  acm_tty_hangup [cdc_acm]
>  __tty_hangup
>  ? __tty_hangup
>  do_tty_hangup
>  process_one_work
>  worker_thread

This could have been fixed by 5dc2470c602da (USB: cdc-acm: Fix disconnect() vs
close() race).

> $ uname -a
> Linux orion 3.1.0-030100-generic #201110241006 SMP Mon Oct 24 14:07:10
> UTC 2011 x86_64 x86_64 x86_64 GNU/Linux

Try updating to 3.1.4 which contains the above commit.

Thanks,
Johan
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