linux-kernel - Re: [PATCH 3/4] reset: tegra: check BPMP response return code

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Message-ID: <f5096c39-6026-d912-f283-ba7511fa4e93@nvidia.com>
Date:   Mon, 2 Oct 2017 21:24:04 +0100
From:   Jon Hunter <jonathanh@...dia.com>
To:     Timo Alho <talho@...dia.com>, <thierry.reding@...il.com>
CC:     <linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/4] reset: tegra: check BPMP response return code


On 07/09/17 10:31, Timo Alho wrote:
> Add checks for return code in BPMP response message.
> 
> Signed-off-by: Timo Alho <talho@...dia.com>
> ---
>  drivers/reset/tegra/reset-bpmp.c | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/reset/tegra/reset-bpmp.c b/drivers/reset/tegra/reset-bpmp.c
> index 5daf2ee..fac2db6 100644
> --- a/drivers/reset/tegra/reset-bpmp.c
> +++ b/drivers/reset/tegra/reset-bpmp.c
> @@ -23,6 +23,7 @@ static int tegra_bpmp_reset_common(struct reset_controller_dev *rstc,
>  	struct tegra_bpmp *bpmp = to_tegra_bpmp(rstc);
>  	struct mrq_reset_request request;
>  	struct tegra_bpmp_message msg;
> +	int err;
>  
>  	memset(&request, 0, sizeof(request));
>  	request.cmd = command;
> @@ -33,7 +34,13 @@ static int tegra_bpmp_reset_common(struct reset_controller_dev *rstc,
>  	msg.tx.data = &request;
>  	msg.tx.size = sizeof(request);
>  
> -	return tegra_bpmp_transfer(bpmp, &msg);
> +	err = tegra_bpmp_transfer(bpmp, &msg);
> +	if (err < 0)
> +		return err;
> +	else if (msg.rx.ret < 0)
> +		return -EINVAL;
> +
> +	return 0;
>  }
>  
>  static int tegra_bpmp_reset_module(struct reset_controller_dev *rstc,

Acked-by: Jon Hunter <jonathanh@...dia.com>

Cheers
Jon

-- 
nvpublic