netdev - Re: linux-next: Tree for Aug 6 [ wireless | iwlwifi

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Date:	Wed, 7 Aug 2013 00:55:33 +0200
From:	Sedat Dilek <sedat.dilek@...il.com>
To:	Johannes Berg <johannes@...solutions.net>, sedat.dilek@...il.com,
	David Miller <davem@...emloft.net>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	wireless <linux-wireless@...r.kernel.org>, netdev@...r.kernel.org
Subject: Re: linux-next: Tree for Aug 6 [ wireless | iwlwifi | mac80211 ? ]

On Tue, Aug 6, 2013 at 11:56 PM, Hannes Frederic Sowa
<hannes@...essinduktion.org> wrote:
> On Tue, Aug 06, 2013 at 11:45:38PM +0200, Johannes Berg wrote:
>> On Tue, 2013-08-06 at 23:40 +0200, Sedat Dilek wrote:
>>
>> > > Does the problem occur on client or server side? AFAICT, hostapd as well
>> > > as wpa_supplicant use AF_PACKET.
>> > >
>> > > The tricky thing is, these patches are meant to *loosen* the
>> > > restrictions in af_packet.c, so *should* not be harmful. So either my
>> > > patches create a side effect I did not foresee, or it's something nasty
>> > > (too much delay introduced by calling eth_type_trans() or so).
>>
>> > By reverting the culprit commit my network/wifi is fine, again.
>> > See also attached patch with changelog.
>>
>> I think skb->protocol is probably getting set up wrong, and just putting
>> back the last two lines
>>
>>         skb->protocol = proto;
>>         skb->dev = dev;
>>
>> is probably sufficient to fix wifi. If skb->protocol isn't set to
>> ETH_P_PAE, then we'd drop the packet in the wifi stack - might be worth
>> printing out what it's set to at the point where the skb->protocol
>> assignment above was removed.
>>
>> I'm trying to wrap my head around all this right now but I don't yet see
>> how the code after the patch would not get skb->protocol correct.
>
> Has anybody tested plain ethernet? I have a malfunctioning dhclient on
> ethernet since the weekend(it seems to not receive any packet). I did not
> look after it because have other patches on my todo list currently. Maybe
> it is the same error?
>

No, tested only with iwlwifi.
Can you try the patch from [1]?

- Sedat -

[1] http://marc.info/?l=linux-netdev&m=137582524017840&w=2

> Greetings,
>
>   Hannes
>
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