netdev - Re: [PATCH] net: ethtool: Return -EOPNOTSUPP if user space tries to read EEPROM with lengh 0

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Message-Id: <20141031.161306.1209095823862991107.davem@davemloft.net>
Date:	Fri, 31 Oct 2014 16:13:06 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	andrew@...n.ch
Cc:	linux@...ck-us.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: ethtool: Return -EOPNOTSUPP if user space tries
 to read EEPROM with lengh 0

From: Andrew Lunn <andrew@...n.ch>
Date: Fri, 31 Oct 2014 04:56:35 +0100

> On Thu, Oct 30, 2014 at 08:50:15PM -0700, Guenter Roeck wrote:
>> If a driver supports reading EEPROM but no EEPROM is installed in the system,
>> the driver's get_eeprom_len function returns 0. ethtool will subsequently
>> try to read that zero-length EEPROM anyway. If the driver does not support
>> EEPROM access at all, this operation will return -EOPNOTSUPP. If the driver
>> does support EEPROM access but no EEPROM is installed, the operation will
>> return -EINVAL. Return -EOPNOTSUPP in both cases for consistency.
>> 
>> Signed-off-by: Guenter Roeck <linux@...ck-us.net>
> 
> root@...665:~# ethtool -e lan4
> Cannot get EEPROM data: Operation not supported
> 
> Tested-by: Andrew Lunn <andrew@...n.ch>

Applied, thanks everyone.
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