linux-kernel - Re: [PATCH net-next 2/3] Add capability to retrieve plug-in module EEPROM

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Message-ID: <1335288545.17274.35.camel@bwh-desktop.uk.solarflarecom.com>
Date:	Tue, 24 Apr 2012 18:29:05 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	Stuart Hodgson <smhodgson@...arflare.com>
CC:	<netdev@...r.kernel.org>, <bruce.w.allan@...el.com>,
	<decot@...gle.com>, <alexander.h.duyck@...el.com>,
	<davem@...emloft.net>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next 2/3] Add capability to retrieve plug-in module
 EEPROM

On Thu, 2012-04-19 at 16:39 +0100, Stuart Hodgson wrote:
> Provides a new struct ethtool_modinfo that will return the
> type and size of plug-in module eeprom (such as SFP+) for parsing
> by userland program.
> 
> The second provides the API to get the raw eeprom information
> using the existing ethtool_eeprom structture to return the data
> 
> Signed-off-by: Stuart Hodgson <smhodgson@...arflare.com>
> ---
>  include/linux/ethtool.h |   33 +++++++++++++++++++++++++++++++++
>  net/core/ethtool.c      |   47 +++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 80 insertions(+), 0 deletions(-)
> 
> diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
> index 89d68d8..f6500f3 100644
> --- a/include/linux/ethtool.h
> +++ b/include/linux/ethtool.h
> @@ -137,6 +137,23 @@ struct ethtool_eeprom {
>  };
> 
>  /**
> + * struct ethtool_modinfo - plugin module eeprom information
> + * @cmd: ETHTOOL_GMODULEINFO
> + * @type: Standard the module information conforms to SFF_xxxx

You renamed the type codes to begin with 'ETH_MODULE_SFF_', so this line
needs to be updated too.

> + * @eeprom_len: Length of the eeprom
> + *
> + * This structure is used to return the information to
> + * properly size memory for a subsequent call to ETHTOOL_GMODULEEEPROM
[...]

The type code is also essential in order to parse the information.

Also, a minor nitpick: you should put a '%' in front of the names of
constants so they can be pretty-printed properly.

Ben.

-- 
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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