From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ben Hutchings <bhutchings@solarflare.com>
Subject: Re: [PATCH -next] qlcnic: fail when try to setup unsupported
 features
Date: Mon, 28 Jun 2010 14:16:51 +0100
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References: <20100628113134.0c5208b0@dhcp-lab-109.englab.brq.redhat.com>
	 <99737F4847ED0A48AECC9F4A1974A4B80F82CB7D46@MNEXMB2.qlogic.org>
	 <20100628145819.74d22d5f@dhcp-lab-109.englab.brq.redhat.com>
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Cc: Amit Salecha <amit.salecha@qlogic.com>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	Amerigo Wang <amwang@redhat.com>,
	Anirban Chakraborty <anirban.chakraborty@qlogic.com>
To: Stanislaw Gruszka <sgruszka@redhat.com>
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On Mon, 2010-06-28 at 14:58 +0200, Stanislaw Gruszka wrote:
> On Mon, 28 Jun 2010 07:36:04 -0500
> Amit Salecha <amit.salecha@qlogic.com> wrote:
> 
> > -	ethtool_op_set_flags(netdev, data);
> > -
> > -	hw_lro = (data & ETH_FLAG_LRO) ? QLCNIC_LRO_ENABLED : 0;
> > +	if (data & ETH_FLAG_LRO) {
> > +		hw_lro = QLCNIC_LRO_ENABLED;
> > +		netdev->features |= NETIF_F_LRO;
> > +	} else {
> > +		hw_lro = 0;
> > +		netdev->features &= ~NETIF_F_LRO;
> > +	}
> > 
> > Above hunk is unnecessary.
> 
> Yes, I did not describe that change in the changelog. I want to
> remove such usage of ethtool_op_set_flags() for my furher patches, where
> I plan to add return EOPNOTSUPP to ethtool_op_set_flags().

You might as well remove ethtool_op_set_flags() in that case, as this is
equivalent to the behaviour when ethtool_ops::set_flags is NULL.

It would be more useful to add a supported_flags parameter to
ethtool_op_set_flags() so it can check the requested flags against the
driver/hardware capabilities.

Ben.

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