linux-kernel - Re: [PATCH -next] firmware: arm_scmi: optee: Fix missing mutex

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Message-ID: <CAN5uoS8_55fCRoUa67LQzWEtLgkf017fESPydht4QV4o_G800A@mail.gmail.com>
Date:   Tue, 23 Nov 2021 14:17:54 +0100
From:   Etienne Carriere <etienne.carriere@...aro.org>
To:     Wei Yongjun <weiyongjun1@...wei.com>
Cc:     Sudeep Holla <sudeep.holla@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org, Hulk Robot <hulkci@...wei.com>
Subject: Re: [PATCH -next] firmware: arm_scmi: optee: Fix missing mutex_init()

On Tue, 23 Nov 2021 at 09:23, Wei Yongjun <weiyongjun1@...wei.com> wrote:
>
> The driver allocates the mutex but not initialize it.
> Use mutex_init() on it to initialize it correctly.
>
> Fixes: 5f90f189a052 ("firmware: arm_scmi: Add optee transport")
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
> ---
>  drivers/firmware/arm_scmi/optee.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/firmware/arm_scmi/optee.c b/drivers/firmware/arm_scmi/optee.c
> index d9819b0197ec..901737c9f5f8 100644
> --- a/drivers/firmware/arm_scmi/optee.c
> +++ b/drivers/firmware/arm_scmi/optee.c
> @@ -506,6 +506,7 @@ static int scmi_optee_service_probe(struct device *dev)
>         agent->dev = dev;
>         agent->tee_ctx = tee_ctx;
>         INIT_LIST_HEAD(&agent->channel_list);
> +       mutex_init(&agent->mu);
>
>         ret = get_capabilities(agent);
>         if (ret)
>

`Reviewed-by: Etienne Carriere <etienne.carriere@...aro.org>`

Indeed. Thanks for the fix.
Etienne