linux-kernel - Re: [RFC PATCH net-next 9/9] ethtool: Add ability to flash transceiver modules' firmware

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Date: Mon, 22 Jan 2024 10:37:59 +0000
From: Simon Horman <horms@...nel.org>
To: Danielle Ratson <danieller@...dia.com>
Cc: netdev@...r.kernel.org, davem@...emloft.net, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com, corbet@....net,
	linux@...linux.org.uk, sdf@...gle.com, kory.maincent@...tlin.com,
	maxime.chevallier@...tlin.com, vladimir.oltean@....com,
	przemyslaw.kitszel@...el.com, ahmed.zaki@...el.com,
	richardcochran@...il.com, shayagr@...zon.com,
	paul.greenwalt@...el.com, jiri@...nulli.us,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	mlxsw@...dia.com, petrm@...dia.com, idosch@...dia.com
Subject: Re: [RFC PATCH net-next 9/9] ethtool: Add ability to flash
 transceiver modules' firmware

On Mon, Jan 22, 2024 at 10:45:30AM +0200, Danielle Ratson wrote:

..

> +static int module_flash_fw(struct net_device *dev, struct nlattr **tb,
> +			   struct netlink_ext_ack *extack)
> +{
> +	struct ethtool_module_fw_flash_params params = {};
> +	struct nlattr *attr;
> +
> +	if (!tb[ETHTOOL_A_MODULE_FW_FLASH_FILE_NAME]) {
> +		NL_SET_ERR_MSG_ATTR(extack,
> +				    tb[ETHTOOL_A_MODULE_FW_FLASH_FILE_NAME],
> +				    "File name attribute is missing");
> +		return -EINVAL;
> +	}
> +
> +	params.file_name =
> +		nla_data(tb[ETHTOOL_A_MODULE_FW_FLASH_FILE_NAME]);
> +
> +	attr = tb[ETHTOOL_A_MODULE_FW_FLASH_PASSWORD];
> +	if (attr) {
> +		params.password = cpu_to_be32(nla_get_u32(attr));

Hi Danielle,

The type of password is u32, so perhaps cpu_to_be32() isn't needed here?

Flagged by Sparse.

> +		params.password_valid = true;
> +	}
> +
> +	return module_flash_fw_schedule(dev, &params, extack);
> +}

..