linux-kernel - Re: [PATCH v2 1/2] optee: fix tee out of memory failure seen during kexec reboot

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Date:   Mon, 22 Mar 2021 13:29:40 +0530
From:   Allen Pais <apais@...ux.microsoft.com>
To:     Jens Wiklander <jens.wiklander@...aro.org>
Cc:     Allen Pais <allen.lkml@...il.com>, zajec5@...il.com,
        bcm-kernel-feedback-list@...adcom.com,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        OP-TEE TrustedFirmware <op-tee@...ts.trustedfirmware.org>
Subject: Re: [PATCH v2 1/2] optee: fix tee out of memory failure seen during
 kexec reboot


>>>>
>>>> [    0.368428] tee_bnxt_fw optee-clnt0: tee_shm_alloc failed
>>>> [    0.368461] tee_bnxt_fw: probe of optee-clnt0 failed with error -22
>>>>
>>>> tee_shm_release() is not invoked on dma shm buffer.
>>>>
>>>> Implement .shutdown() method to handle the release of the buffers
>>>> correctly.
>>>>
>>>> More info:
>>>> https://github.com/OP-TEE/optee_os/issues/3637
>>>>
>>>> Signed-off-by: Allen Pais <apais@...ux.microsoft.com>
>>>> ---
>>>>    drivers/tee/optee/core.c | 20 ++++++++++++++++++++
>>>>    1 file changed, 20 insertions(+)
>>>
>>> This looks good to me. Do you have a practical way of testing this on
>>> QEMU for instance?
>>>
>>
>> Jens,
>>
>>     I could not reproduce nor create a setup using QEMU, I could only
>> do it on a real h/w.
>>
>>     I have extensively tested the fix and I don't see any issues.
> 
> I did a few test runs too, seems OK.

Thank you very much.