linux-kernel - Re: [PATCH] USB2NET : SR9800 : One chip USB2.0 USB2NET SR9800 Device Driver Support

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Message-ID: <20140212101245.GA3409@ulmo.nvidia.com>
Date:	Wed, 12 Feb 2014 11:12:46 +0100
From:	Thierry Reding <thierry.reding@...il.com>
To:	liujunliang_ljl@....com
Cc:	davem@...emloft.net, horms@...ge.net.au, joe@...ches.com,
	romieu@...zoreil.com, gregkh@...uxfoundation.org,
	netdev@...r.kernel.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, sunhecheng@....126.com
Subject: Re: [PATCH] USB2NET : SR9800 : One chip USB2.0 USB2NET SR9800 Device
 Driver Support

On Mon, Feb 10, 2014 at 01:33:39PM +0800, liujunliang_ljl@....com wrote:
> From: Liu Junliang <liujunliang_ljl@....com>
> 
> 
> Signed-off-by: Liu Junliang <liujunliang_ljl@....com>
> ---
>  drivers/net/usb/Kconfig  |   16 +
>  drivers/net/usb/Makefile |    1 +
>  drivers/net/usb/sr9800.c |  873 ++++++++++++++++++++++++++++++++++++++++++++++
>  drivers/net/usb/sr9800.h |  202 +++++++++++
>  4 files changed, 1092 insertions(+), 0 deletions(-)
>  create mode 100644 drivers/net/usb/sr9800.c
>  create mode 100644 drivers/net/usb/sr9800.h
> 
> diff --git a/drivers/net/usb/Kconfig b/drivers/net/usb/Kconfig
> index 47b0f73..2551bf6 100644
> --- a/drivers/net/usb/Kconfig
> +++ b/drivers/net/usb/Kconfig
> @@ -291,6 +291,22 @@ config USB_NET_SR9700
>  	  This option adds support for CoreChip-sz SR9700 based USB 1.1
>  	  10/100 Ethernet adapters.
>  
> +config USB_NET_SR9800
> +	tristate "CoreChip-sz SR9800 based USB 2.0 10/100 ethernet devices"
> +	depends on USB_USBNET
> +	select CRC32
> +	default y

Why is this selected by default? I can see that some of the other USB
network drivers are also selected by default, but not all of them. Is
there some rule of thumb as to which should default to y and which
shouldn't?

Thierry

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