netdev - Re: [RFC PATCH 1/2] net: ethtool: Add capability to retrieve plug-in module EEPROM

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Date:	Mon, 2 Apr 2012 19:14:38 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	Stuart Hodgson <smhodgson@...arflare.com>
CC:	<netdev@...r.kernel.org>, <bruce.w.allan@...el.com>,
	<mirq-linux@...e.qmqm.pl>, <decot@...gle.com>,
	<amit.salecha@...gic.com>, <alexander.h.duyck@...el.com>,
	<davem@...emloft.net>, <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 1/2] net: ethtool: Add capability to retrieve
 plug-in module EEPROM

On Mon, 2012-04-02 at 18:52 +0100, Ben Hutchings wrote:
[...]
> > +    ret = ops->get_module_eeprom(dev, &eeprom, data);
> > +    if (ret)
> > +        goto out;
> > +
> > +
> > +    if (copy_to_user(userbuf, data, eeprom.len)) {
> > +        ret = -EFAULT;
> > +        goto out;
> > +    }
> > +
> > +    if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
> > +        ret = -EFAULT;
> [...]
> 
> I think you can drop this last copy as there's no information to return
> in the eeprom structure itself.
[...]

This is not the case because we need to cover short reads.

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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