linux-kernel - Re: [PATCH v2] tee: optee: Fix supplicant based device enumeration

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Message-ID: <CAHUa44Gyzv23c+L7dKQXh0oVgbJ_96guOZwTb7o87f2Gy9b9Dg@mail.gmail.com>
Date:   Mon, 16 Oct 2023 09:32:06 +0200
From:   Jens Wiklander <jens.wiklander@...aro.org>
To:     Sumit Garg <sumit.garg@...aro.org>
Cc:     Jan Kiszka <jan.kiszka@...mens.com>,
        op-tee@...ts.trustedfirmware.org, arnd@...aro.org, ardb@...nel.org,
        jerome.forissier@...aro.org, ilias.apalodimas@...aro.org,
        masahisa.kojima@...aro.org, maxim.uvarov@...aro.org,
        jarkko.sakkinen@...ux.intel.com, linux-kernel@...r.kernel.org,
        "Lopes Ivo, Diogo Miguel (T CED IFD-PT)" <diogo.ivo@...mens.com>
Subject: Re: [PATCH v2] tee: optee: Fix supplicant based device enumeration

Hi Sumit,

On Thu, Oct 12, 2023 at 2:40 PM Sumit Garg <sumit.garg@...aro.org> wrote:
>
> On Wed, 11 Oct 2023 at 20:15, Jan Kiszka <jan.kiszka@...mens.com> wrote:
> >
> > On 29.08.23 13:03, Sumit Garg wrote:
> > > Hi Jan,
> > >
> > > On Fri, 28 Jul 2023 at 19:18, Sumit Garg <sumit.garg@...aro.org> wrote:
> > >>
> > >> Currently supplicant dependent optee device enumeration only registers
> > >> devices whenever tee-supplicant is invoked for the first time. But it
> > >> forgets to remove devices when tee-supplicant daemon stops running and
> > >> closes its context gracefully. This leads to following error for fTPM
> > >> driver during reboot/shutdown:
> > >>
> > >> [   73.466791] tpm tpm0: ftpm_tee_tpm_op_send: SUBMIT_COMMAND invoke error: 0xffff3024
> > >>
> > >> Fix this by separating supplicant dependent devices so that the
> > >> user-space service can detach supplicant devices before closing the
> > >> supplicant. While at it use the global system workqueue for OP-TEE bus
> > >> scanning work rather than our own custom one.
> > >>
> > >> Reported-by: Jan Kiszka <jan.kiszka@...mens.com>
> > >> Link: https://github.com/OP-TEE/optee_os/issues/6094
> > >
> > > I see you have marked this issue as resolved. It would be good to have
> > > your tested-by tag if it works for you.
> > >
> >
> > Sorry for this very late reply. We finally validated that this works
> > fine for us, though only over 6.1, our current test target. I hope we
> > can enable tip of tree soon as well. But I think I can still add my
> >
> > Tested-by: Jan Kiszka <jan.kiszka@...mens.com>
> >
>
> Thanks.
>
> Jens,
>
> Can you queue up this fix?

Sure, please supply this as two patches. One for the work queue
changes and one for the device name change.

Thanks,
Jens

>
> -Sumit
>
> > Jan
> >
> > --
> > Siemens AG, Technology
> > Linux Expert Center
> >