On 2021-02-25 14:36:10, Allen Pais wrote:
> From: Allen Pais <ap...@linux.microsoft.com>
> 
>  On kexec reboot the firmware driver fails to deallocate
> shm memory leading to a memory leak. Implement .shutdown()
> method to handle kexec reboots and to release shm buffers
> correctly.
> 
> Signed-off-by: Allen Pais <ap...@linux.microsoft.com>

Reviewed-by: Tyler Hicks <tyhi...@linux.microsoft.com>

Tyler

> ---
>  drivers/firmware/broadcom/tee_bnxt_fw.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/drivers/firmware/broadcom/tee_bnxt_fw.c 
> b/drivers/firmware/broadcom/tee_bnxt_fw.c
> index ed10da5313e8..4c62e044a99f 100644
> --- a/drivers/firmware/broadcom/tee_bnxt_fw.c
> +++ b/drivers/firmware/broadcom/tee_bnxt_fw.c
> @@ -242,6 +242,14 @@ static int tee_bnxt_fw_remove(struct device *dev)
>       return 0;
>  }
>  
> +static void tee_bnxt_fw_shutdown(struct device *dev)
> +{
> +     tee_shm_free(pvt_data.fw_shm_pool);
> +     tee_client_close_session(pvt_data.ctx, pvt_data.session_id);
> +     tee_client_close_context(pvt_data.ctx);
> +     pvt_data.ctx = NULL;
> +}
> +
>  static const struct tee_client_device_id tee_bnxt_fw_id_table[] = {
>       {UUID_INIT(0x6272636D, 0x2019, 0x0716,
>                   0x42, 0x43, 0x4D, 0x5F, 0x53, 0x43, 0x48, 0x49)},
> @@ -257,6 +265,7 @@ static struct tee_client_driver tee_bnxt_fw_driver = {
>               .bus            = &tee_bus_type,
>               .probe          = tee_bnxt_fw_probe,
>               .remove         = tee_bnxt_fw_remove,
> +             .shutdown       = tee_bnxt_fw_shutdown,
>       },
>  };
>  
> -- 
> 2.25.1
> 

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