linux-kernel - Re: [PATCH 1/1] smsc95xx: add FLAG_POINTTOPOINT flag for driver

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Date:	Thu, 17 May 2012 16:40:46 +0800
From:	Xiao Jiang <jgq516@...il.com>
To:	Ben Hutchings <ben@...adent.org.uk>
CC:	steve.glendinning@...c.com, gregkh@...uxfoundation.org,
	netdev@...r.kernel.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] smsc95xx: add FLAG_POINTTOPOINT flag for driver_info

Ben Hutchings wrote:
> On Wed, 2012-05-16 at 16:01 +0800, jgq516@...il.com wrote:
>   
>> From: Xiao Jiang <jgq516@...il.com>
>>
>> commit c26134 introduced FLAG_POINTTOPOINT flag for USB ethernet devices
>> which possibly use "usb%d" names, add this flag to make sure pandaboard
>> can mount nfs with smsc95xx NIC.
>>     
>
> These are normal Ethernet interfaces, whereas FLAG_POINTTOPOINT is for
> devices that use non-standard short physical links.
>
>   
This flag is used by some usb NICs, I amn't familiar with those cards 
perhaps those are
non-standard short physical links as you said.
But smsc95xx seems need this flag to use "usb%d" name, at least my 
pandaboard can't
mount nfs with eth0 name, is there other ways to avoid nfs issue with 
keep smsc95xx's
name unchange? thanks.

-bash-3.2$ grep FLAG_POINTTOPOINT * -r
drivers/net/usb/zaurus.c:    .flags =    FLAG_POINTTOPOINT | FLAG_FRAMING_Z,
drivers/net/usb/zaurus.c:    .flags =    FLAG_POINTTOPOINT | FLAG_FRAMING_Z,
drivers/net/usb/zaurus.c:    .flags =    FLAG_POINTTOPOINT | FLAG_FRAMING_Z,
drivers/net/usb/zaurus.c:    .flags =    FLAG_POINTTOPOINT | FLAG_FRAMING_Z,
drivers/net/usb/cdc_ncm.c:    .flags = FLAG_POINTTOPOINT | 
FLAG_NO_SETINT | FLAG_MULTI_PACKET,
drivers/net/usb/gl620a.c:    .flags =    FLAG_POINTTOPOINT | 
FLAG_FRAMING_GL | FLAG_NO_SETINT,
drivers/net/usb/plusb.c:    .flags =    FLAG_POINTTOPOINT | FLAG_NO_SETINT,
drivers/net/usb/usbnet.c:            ((dev->driver_info->flags & 
FLAG_POINTTOPOINT) == 0 ||
drivers/net/usb/cdc_subset.c:    .flags       = FLAG_POINTTOPOINT,
drivers/net/usb/cdc_subset.c:    .flags       = FLAG_POINTTOPOINT,
drivers/net/usb/cdc_subset.c:    .flags       = FLAG_POINTTOPOINT,
drivers/net/usb/cdc_subset.c:    .flags = FLAG_POINTTOPOINT,
drivers/net/usb/cdc_subset.c:    .flags = FLAG_POINTTOPOINT,
drivers/net/usb/cdc_subset.c:    .flags = FLAG_POINTTOPOINT,
drivers/net/usb/cdc_subset.c:    .flags = FLAG_POINTTOPOINT,
drivers/net/usb/cdc_subset.c:    .flags = FLAG_POINTTOPOINT,
drivers/net/usb/cdc_eem.c:    .flags =    FLAG_ETHER | FLAG_POINTTOPOINT,
drivers/net/usb/rndis_host.c:    .flags =    FLAG_ETHER | 
FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT,
drivers/net/usb/rndis_host.c:    .flags =    FLAG_ETHER | 
FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT,
drivers/net/usb/cdc_ether.c:    .flags =    FLAG_ETHER | FLAG_POINTTOPOINT,
drivers/net/usb/net1080.c:    .flags =    FLAG_POINTTOPOINT | 
FLAG_FRAMING_NC,
include/linux/usb/usbnet.h:#define FLAG_POINTTOPOINT 0x1000    /* 
possibly use "usb%d" names */

Regards,
Xiao
> Ben.
>
>   
>> Signed-off-by: Xiao Jiang <jgq516@...il.com>
>> ---
>>  drivers/net/usb/smsc95xx.c |    3 ++-
>>  1 files changed, 2 insertions(+), 1 deletions(-)
>>
>> diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
>> index 94ae669..e158288 100644
>> --- a/drivers/net/usb/smsc95xx.c
>> +++ b/drivers/net/usb/smsc95xx.c
>> @@ -1192,7 +1192,8 @@ static const struct driver_info smsc95xx_info = {
>>  	.rx_fixup	= smsc95xx_rx_fixup,
>>  	.tx_fixup	= smsc95xx_tx_fixup,
>>  	.status		= smsc95xx_status,
>> -	.flags		= FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
>> +	.flags		= FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_SEND_ZLP |
>> +			  FLAG_LINK_INTR,
>>  };
>>  
>>  static const struct usb_device_id products[] = {
>>     
>
>   

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