netdev - Re: [PATCH net-next V1 1/2] ethtool: Support for configurable RSS hash function

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Message-ID: <5471B362.6050706@dev.mellanox.co.il>
Date:	Sun, 23 Nov 2014 12:13:54 +0200
From:	Eyal perry <eyalpe@....mellanox.co.il>
To:	David Miller <davem@...emloft.net>, amirv@...lanox.com
CC:	netdev@...r.kernel.org, ben@...adent.org.uk, ogerlitz@...lanox.com,
	yevgenyp@...lanox.com, eyalpe@...lanox.com,
	thomas.lendacky@....com, ariel.elior@...gic.com,
	prashant@...adcom.com, mchan@...adcom.com, hariprasad@...lsio.com,
	sathya.perla@...lex.com, subbu.seetharaman@...lex.com,
	ajit.khaparde@...lex.com, jeffrey.t.kirsher@...el.com,
	jesse.brandeburg@...el.com, bruce.w.allan@...el.com,
	carolyn.wyborny@...el.com, donald.c.skidmore@...el.com,
	gregory.v.rose@...el.com, matthew.vick@...el.com,
	john.ronciak@...el.com, mitch.a.williams@...el.com,
	linux-net-drivers@...arflare.com, sshah@...arflare.com,
	sbhatewara@...are.com, pv-drivers@...are.com
Subject: Re: [PATCH net-next V1 1/2] ethtool: Support for configurable RSS
 hash function

On 11/22/2014 11:54 PM, David Miller wrote:
> From: Amir Vadai <amirv@...lanox.com>
> Date: Thu, 20 Nov 2014 16:26:49 +0200
> 
>> +	/* We require at least one supported parameter to be changed and no
>> +	 * change in any of the unsupported parameters
>> +	 */
>> +	if ((!indir && !key) || hfunc != ETH_RSS_HASH_NO_CHANGE)
>> +		return -EOPNOTSUPP;
>> +
> 
> I know it will make more work for you, but all of these driver
> implementations of this hook should:
> 
> 1) Accept hfunc of whatever hash function the chip is using,
>    not just ETH_RSS_HASH_NO_CHANGE.
> 
> 2) Provide an accurate hfunc value in the ->get() call.
Ok, I'll do it for V2.
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