linux-kernel - Re: [PATCH 11/11] net: xilinx: Show csum in bootlog

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Message-ID: <1349444212.16173.37.camel@deadeye.wl.decadent.org.uk>
Date:	Fri, 5 Oct 2012 14:36:52 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	<monstr@...str.eu>
CC:	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Anirudha Sarangi <anirudh@...inx.com>,
	John Linn <John.Linn@...inx.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH 11/11] net: xilinx: Show csum in bootlog

On Fri, 2012-10-05 at 07:48 +0200, Michal Simek wrote:
> On 10/04/2012 09:15 PM, Ben Hutchings wrote:
> > On Thu, 2012-10-04 at 20:14 +0200, Michal Simek wrote:
> >> Just show current setting in bootlog.
> > [...]
> >> --- a/drivers/net/ethernet/xilinx/ll_temac_main.c
> >> +++ b/drivers/net/ethernet/xilinx/ll_temac_main.c
> >> @@ -1052,12 +1052,14 @@ static int __devinit temac_of_probe(struct platform_device *op)
> >>   	/* Setup checksum offload, but default to off if not specified */
> >>   	lp->temac_features = 0;
> >>   	p = (__be32 *)of_get_property(op->dev.of_node, "xlnx,txcsum", NULL);
> >> +	dev_info(&op->dev, "TX_CSUM %d\n", be32_to_cpup(p));
> >>   	if (p && be32_to_cpu(*p)) {
> >>   		lp->temac_features |= TEMAC_FEATURE_TX_CSUM;
> >>   		/* Can checksum TCP/UDP over IPv4. */
> >>   		ndev->features |= NETIF_F_IP_CSUM;
> >>   	}
> >>   	p = (__be32 *)of_get_property(op->dev.of_node, "xlnx,rxcsum", NULL);
> >> +	dev_info(&op->dev, "RX_CSUM %d\n", be32_to_cpup(p));
> > [...]
> >
> > Is there any particular reason you think this needs to be logged by
> > default, rather than letting users run ethtool -k?  I suggest using
> > dev_dbg() instead.
> 
> The reason was just to show it in the bootlog.
> I will check ethtool support for these drivers.

'ethtool -k' should just work so long as the driver sets the right bits
in ndev->features.

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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