netdev - Re: Is this 32-bit NCM?y

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Message-ID: <548028A0.5000909@audiocodes.com>
Date:	Thu, 4 Dec 2014 09:26:20 +0000
From:	Kevin Zhu <Mingying.Zhu@...iocodes.com>
To:	Bjørn Mork <bjorn@...k.no>
CC:	Enrico Mioso <mrkiko.rs@...il.com>,
	Eli Britstein <Eli.Britstein@...iocodes.com>,
	Alex Strizhevsky <alexxst@...il.com>,
	"Midge Shaojun Tan" <ShaojunMidge.Tan@...iocodes.com>,
	"youtux@...il.com" <youtux@...il.com>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: Is this 32-bit NCM?y

I will find it out. And I don't have v3.16 and I'm not going to upgrade
my OS to that. Sorry. So I would just stick to v3.13. Anyway, that size
is wrong, it should be fixed.

Regards,
Kevin

On 12/04/2014 05:19 PM, Bjørn Mork wrote:
> Kevin Zhu <Mingying.Zhu@...iocodes.com> writes:
>
>> Guys,
>>
>> After rearranging the padding, putting NCM0 right after NTH, and disable
>> ARP (FLAG_NOARP) and handling the offset alignment issue, it seems it
>> begins to work, though there's still problem with DHCP.
> Great!  But it would be good to know if _one_ of these changes is enough
> to make it work.
>
>> The DHCP packet's size becomes a large one after the TX function, which
>> is 16384, the maximum.
> You can now (from v3.16) disable the padding by setting min_tx_pkt >= tx_max.
> Something like this should do for a simple test:
>
>   echo 16384 >/sys/class/net/wwan0/cdc_ncm/min_tx_pkt
>
>
> Bjørn
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