linux-kernel - Re: [PATCH net-next v5 09/10] ethtool: Add ability to flash transceiver modules' firmware

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Message-ID: <20240429202237.6bbd2cb3@kernel.org>
Date: Mon, 29 Apr 2024 20:22:37 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Danielle Ratson <danieller@...dia.com>
Cc: <netdev@...r.kernel.org>, <davem@...emloft.net>, <edumazet@...gle.com>,
 <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: [PATCH net-next v5 09/10] ethtool: Add ability to flash
 transceiver modules' firmware

On Wed, 24 Apr 2024 16:30:22 +0300 Danielle Ratson wrote:
> +static int
> +module_flash_fw_schedule(struct net_device *dev, const char *file_name,
> +			 struct ethtool_module_fw_flash_params *params,
> +			 struct netlink_ext_ack *extack)
> +{
> +	struct ethtool_module_fw_flash *module_fw;
> +	int err;
> +
> +	err = __module_flash_fw_schedule(dev, extack);
> +	if (err < 0)
> +		return err;

Basic dev validation should probably be called directly from
ethnl_act_module_fw_flash() rather than two functions down.

> +	module_fw = kzalloc(sizeof(*module_fw), GFP_KERNEL);
> +	if (!module_fw)
> +		return -ENOMEM;
> +
> +	module_fw->params = *params;
> +	err = request_firmware_direct(&module_fw->fw, file_name, &dev->dev);
> +	if (err) {
> +		NL_SET_ERR_MSG(extack,
> +			       "Failed to request module firmware image");
> +		goto err_request_firmware;

Please name the labels after the actions they perform.

> +	}
> +
> +	err = module_flash_fw_work_init(module_fw, dev, extack);
> +	if (err < 0) {
> +		NL_SET_ERR_MSG(extack,
> +			       "Flashing module firmware is not supported by this device");

This overwrites the more accurate extack msg already set by
module_flash_fw_work_init()

> +		goto err_work_init;
> +	}