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

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Message-ID: <CA+icZUXdAjEDgu2XrA4Dg2hsLDJYdFTCpJwiW6=ZUgULe2noyw@mail.gmail.com>
Date:	Tue, 6 Aug 2013 21:32:26 +0200
From:	Sedat Dilek <sedat.dilek@...il.com>
To:	Johannes Berg <johannes@...solutions.net>,
	Phil Sutter <phil@....cc>
Cc:	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 9:18 PM, Johannes Berg <johannes@...solutions.net> wrote:
> On Tue, 2013-08-06 at 21:14 +0200, Sedat Dilek wrote:
>> On Tue, Aug 6, 2013 at 9:08 PM, Johannes Berg <johannes@...solutions.net> wrote:
>> > On Tue, 2013-08-06 at 20:35 +0200, Sedat Dilek wrote:
>> >
>> >> Attached is a diff comparing all new commits in next-20130805.
>> >> If one of the commits smells bad to you, please let me know.
>> >
>> > Out of that list, only the af_packet changes would seem to have any
>> > impact on wireless at all.
>> >
>>
>> git-bisecting... 2 steps to go...
>>
>> This one is bad... "af_packet: simplify VLAN frame check in packet_snd"
>>
>> http://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git/commit/?id=c483e02614551e44ced3fe6eedda8e36d3277ccc
>
> That seems weird, does reverting it fix it?
>

[ TO Phil Sutter ]

This was 3/3 of af_packet patches :-).

So, the culprit commit is...

0f75b09c798ed00c30d7d5551b896be883bc2aeb is the first bad commit
commit 0f75b09c798ed00c30d7d5551b896be883bc2aeb
Author: Phil Sutter <phil@....cc>
Date:   Fri Aug 2 11:37:39 2013 +0200

    af_packet: when sending ethernet frames, parse header for skb->protocol

    This may be necessary when the SKB is passed to other layers on the go,
    which check the protocol field on their own. An example is a VLAN packet
    sent out using AF_PACKET on a bridge interface. The bridging code checks
    the SKB size, accounting for any VLAN header only if the protocol field
    is set accordingly.

    Note that eth_type_trans() sets skb->dev to the passed argument, so this
    can be skipped in packet_snd() for ethernet frames, as well.

    Signed-off-by: Phil Sutter <phil@....cc>
    Signed-off-by: David S. Miller <davem@...emloft.net>

:040000 040000 af403a20a321517f6cfb51d2e22c17ca5a60e947
1f302ebd62a87b9e874a3e61203499e17d6fce3c M      net

- Sedat -

View attachment "git-bisect-log.txt" of type "text/plain" (1834 bytes)

View attachment "git-bisect-visualize.txt" of type "text/plain" (786 bytes)