netdev - Re: [ANNOUNCEMENT] NET: usb: sierra

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Date:	Mon, 29 Mar 2010 13:29:53 -0700
From:	Marcel Holtmann <marcel@...tmann.org>
To:	sclark46@...thlink.net
Cc:	Elina Pasheva <epasheva@...rrawireless.com>,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	Rory Filer <rfiler@...rrawireless.com>, netdev@...r.kernel.org,
	linux-usb <linux-usb@...r.kernel.org>
Subject: Re: [ANNOUNCEMENT] NET: usb: sierra_net.c driver

Hi Stephen,

> >> +static const struct driver_info sierra_net_info_68A3 = {
> >> +	.description = "Sierra Wireless USB-Ethernet Modem",
> >> +	.flags = FLAG_ETHER | FLAG_SEND_ZLP,
> >> +	.bind = sierra_net_bind,
> >> +	.unbind = sierra_net_unbind,
> >> +	.status = sierra_net_status,
> >> +	.rx_fixup = sierra_net_rx_fixup,
> >> +	.tx_fixup = sierra_net_tx_fixup,
> >> +	.data = (unsigned long)&sierra_net_info_data_68A3,
> >> +};
> >
> > the FLAG_ETHER is wrong here. Please use FLAG_WWAN to clearly mark these
> > interfaces.
> >
> > Otherwise we have wrong DEVTYPE uevent assignments and userspace will
> > treat them as real Ethernet cards. And that should not happen. As a nice
> Why shouldn't that happen if they look like NIC cards?

because they are not NIC cards. They just use Ethernet emulation. And
they also require a management interface to setup APN and activate them
first.

It is important that we tell userspace about the type of a network
interface. We do the same for WiMAX and WiFi btw.

Regards

Marcel


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