From: Ivo van Doorn <ivdoorn@gmail.com>
To: Johannes Berg <johannes@sipsolutions.net>
Cc: Nikolai ZHUBR <zhubr@mail.ru>, linux-wireless@vger.kernel.org
Subject: Re: ieee80211_tx_status: headroom too small
Date: Sat, 31 Oct 2009 11:17:22 +0100 [thread overview]
Message-ID: <200910311117.22300.IvDoorn@gmail.com> (raw)
In-Reply-To: <1256983432.3555.121.camel@johannes.local>
On Saturday 31 October 2009, Johannes Berg wrote:
> On Sat, 2009-10-31 at 10:44 +0100, Ivo van Doorn wrote:
>
> > > Or maybe we should just not bother with having drivers do the alignment
> > > any more -- mac80211 does that now and it only does it if necessary
> > > (i.e. not on powerpc/x86)
> >
> > I think you mean the RX alignment, while I am talking about the TX alignment.
> > Beacons and some othe frames must be 4-byte alignment because the wireleless
> > hardware requires it.
>
> Oh, indeed, I got confused.
>
> Hmm. TX alignment is weird ... no driver really needs that except rt2x00
> afaik. Which frames require this?
At the least the beacons, but I am not sure about if there are other frame types
which also have this requirement.
Users had reported that if they align beacon frames, rt2500pci finally starts
beaconing correctly in master mode.
Ivo
next prev parent reply other threads:[~2009-10-31 10:17 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-30 20:00 ieee80211_tx_status: headroom too small Nikolai ZHUBR
2009-10-30 20:03 ` Luis R. Rodriguez
2009-10-30 20:49 ` Re[2]: " Nikolai ZHUBR
2009-10-30 20:59 ` Johannes Berg
2009-10-30 21:56 ` Re[2]: " Nikolai ZHUBR
2009-10-31 5:46 ` Johannes Berg
2009-10-31 8:51 ` Ivo van Doorn
2009-10-31 8:56 ` Johannes Berg
2009-10-31 8:59 ` Ivo van Doorn
2009-10-31 9:25 ` Johannes Berg
2009-10-31 9:30 ` Ivo van Doorn
2009-10-31 9:34 ` Johannes Berg
2009-10-31 9:44 ` Ivo van Doorn
2009-10-31 10:03 ` Johannes Berg
2009-10-31 10:17 ` Ivo van Doorn [this message]
2009-10-31 10:23 ` Johannes Berg
2009-10-31 10:33 ` Ivo van Doorn
2009-10-31 14:24 ` Re[2]: " Nikolai ZHUBR
2009-10-31 15:35 ` Johannes Berg
2009-10-31 17:42 ` Re[4]: " Nikolai ZHUBR
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