linux-kernel - Re: [PATCHv3] drivers/net/usb: Add new driver ipheth

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Message-ID: <1270228883.12516.140.camel@localhost>
Date:	Fri, 02 Apr 2010 18:21:23 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	"\"L. Alberto" Giménez" <agimenez@...valve.es>
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	linux-usb@...r.kernel.org, oliver@...kum.org,
	linville@...driver.com, j.dumon@...ion.com,
	steve.glendinning@...c.com, davem@...emloft.net, gregkh@...e.de,
	dgiagio@...il.com, dborca@...oo.com
Subject: Re: [PATCHv3] drivers/net/usb: Add new driver ipheth

On Fri, 2010-04-02 at 19:15 +0200, "L. Alberto Giménez" wrote:
> On 04/01/2010 01:18 AM, Ben Hutchings wrote:
> > On Wed, 2010-03-31 at 21:42 +0200, L. Alberto Giménez wrote:
> > [...]
> >> --- /dev/null
> >> +++ b/drivers/net/usb/ipheth.c
> > [...]
> 
> Hi Ben,
> 
> Upstream has fixed several errors pointed out by you and Oliver (thanks
> for that), but some of them are still pending.
> 
> I will send patches on top of my last driver submission (if the proper
> way would be resubmit the whole code, please tell me. Anyway I need to
> clarify some doubts...

Since David Miller has not merged your original patch, you should send a
single new patch with the changes incorporated.

> >> +	usb_fill_bulk_urb(dev->tx_urb, udev,
> >> +			  usb_sndbulkpipe(udev, dev->bulk_out),
> >> +			  dev->tx_buf, IPHETH_BUF_SIZE,
> >> +			  ipheth_sndbulk_callback,
> >> +			  dev);
> >> +	dev->tx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
> >> +
> >> +	retval = usb_submit_urb(dev->tx_urb, GFP_ATOMIC);
> >> +	if (retval) {
> >> +		err("%s: usb_submit_urb: %d", __func__, retval);
> >> +		dev->stats.tx_errors++;
> >> +		dev_kfree_skb_irq(skb);
> >> +	} else {
> >> +		net->trans_start = jiffies;
> > 
> > No longer needed.
> 
> What is not longer needed? The assignment, the whole "else" branch? If
> the assignment is what is not needed, can I just remove that line, right?

The assignment is not needed.

> > [...]
> >> +#ifdef HAVE_NET_DEVICE_OPS
> >> +static const struct net_device_ops ipheth_netdev_ops = {
> >> +       .ndo_open = &ipheth_open,
> >> +       .ndo_stop = &ipheth_close,
> >> +       .ndo_start_xmit = &ipheth_tx,
> >> +       .ndo_tx_timeout = &ipheth_tx_timeout,
> >> +       .ndo_get_stats = &ipheth_stats,
> >> +};
> >> +#endif
> > 
> > Remove the #ifdef, there is no question whether we have net_device_ops.
> 
> Ok, I will just remove both #ifdefs, but why is that? Maybe in previous
> versions of the kernel the net_device_ops struct was introduced and now
> it's present no matter how you configure your kernel?
[...]

Correct, it is now mandatory.

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.

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