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From: Jens Wiklander <jens.wiklander@linaro.org>
To: Allen Pais <allen.lkml@gmail.com>
Cc: zajec5@gmail.com, bcm-kernel-feedback-list@broadcom.com,
	Linux ARM <linux-arm-kernel@lists.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	op-tee@lists.trustedfirmware.org,
	Allen Pais <apais@linux.microsoft.com>
Subject: Re: [PATCH v2 1/2] optee: fix tee out of memory failure seen during kexec reboot
Date: Mon, 1 Mar 2021 15:35:36 +0100	[thread overview]
Message-ID: <CAHUa44F5Ew6U80t7PPmV1J4KunXBm_izBxVrxg=x8azjBz0r9Q@mail.gmail.com> (raw)
In-Reply-To: <20210225090610.242623-2-allen.lkml@gmail.com>

On Thu, Feb 25, 2021 at 10:06 AM Allen Pais <allen.lkml@gmail.com> wrote:
>
> From: Allen Pais <apais@linux.microsoft.com>
>
> The following out of memory errors are seen on kexec reboot
> from the optee core.
>
> [    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@linux.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?

Thanks,
Jens

>
> diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c
> index cf4718c6d35d..80e2774b5e2a 100644
> --- a/drivers/tee/optee/core.c
> +++ b/drivers/tee/optee/core.c
> @@ -582,6 +582,13 @@ static optee_invoke_fn *get_invoke_func(struct device *dev)
>         return ERR_PTR(-EINVAL);
>  }
>
> +/* optee_remove - Device Removal Routine
> + * @pdev: platform device information struct
> + *
> + * optee_remove is called by platform subsystem to alter the driver
> + * that it should release the device
> + */
> +
>  static int optee_remove(struct platform_device *pdev)
>  {
>         struct optee *optee = platform_get_drvdata(pdev);
> @@ -612,6 +619,18 @@ static int optee_remove(struct platform_device *pdev)
>         return 0;
>  }
>
> +/* optee_shutdown - Device Removal Routine
> + * @pdev: platform device information struct
> + *
> + * platform_shutdown is called by the platform subsystem to alter
> + * the driver that a shutdown/reboot(or kexec) is happening and
> + * device must be disabled.
> + */
> +static void optee_shutdown(struct platform_device *pdev)
> +{
> +       optee_disable_shm_cache(platform_get_drvdata(pdev));
> +}
> +
>  static int optee_probe(struct platform_device *pdev)
>  {
>         optee_invoke_fn *invoke_fn;
> @@ -738,6 +757,7 @@ MODULE_DEVICE_TABLE(of, optee_dt_match);
>  static struct platform_driver optee_driver = {
>         .probe  = optee_probe,
>         .remove = optee_remove,
> +       .shutdown = optee_shutdown,
>         .driver = {
>                 .name = "optee",
>                 .of_match_table = optee_dt_match,
> --
> 2.25.1
>

  reply	other threads:[~2021-03-01 14:36 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-25  9:06 [PATCH v2 0/2] optee: fix OOM seen due to tee_shm_free() Allen Pais
2021-02-25  9:06 ` [PATCH v2 1/2] optee: fix tee out of memory failure seen during kexec reboot Allen Pais
2021-03-01 14:35   ` Jens Wiklander [this message]
2021-03-02  5:51     ` Allen Pais
2021-03-16 13:21     ` Allen Pais
2021-03-19  7:00       ` Jens Wiklander
2021-03-22  7:59         ` Allen Pais
2021-05-05 13:45         ` Allen Pais
2021-05-06  7:02           ` Jens Wiklander
2021-05-06  7:10             ` Allen Pais
2021-05-06  7:19               ` Jens Wiklander
2021-05-06  7:29                 ` Allen Pais
2021-05-06  8:15                   ` Jens Wiklander
2021-05-06  8:35                     ` Allen Pais
2021-05-07  7:03                     ` Allen Pais
2021-03-18 20:51   ` Tyler Hicks
2021-02-25  9:06 ` [PATCH v2 2/2] firmware: tee_bnxt: implement shutdown method to handle kexec reboots Allen Pais
2021-03-18 20:55   ` Tyler Hicks
2021-05-07  3:58 ` [PATCH] optee: Disable shm cache when booting the crash kernel Tyler Hicks
2021-05-07  7:00   ` Allen Pais
2021-05-07  9:23     ` Jens Wiklander
2021-05-07  9:32       ` Allen Pais
2021-05-07 13:17       ` Tyler Hicks
2021-05-10  7:31         ` Jens Wiklander
2021-05-12  0:23           ` Tyler Hicks
2021-05-12  5:50             ` Jens Wiklander
2021-05-17 20:24               ` Tyler Hicks
2021-05-17 20:31   ` Tyler Hicks

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