From: Michael Buesch <mb@bu3sch.de>
To: Mattias Nissler <mattias.nissler@gmx.de>
Cc: linux-wireless@vger.kernel.org, rt2400-devel@lists.sourceforge.net
Subject: Re: suspend/resume support in mac80211
Date: Sun, 5 Aug 2007 23:44:12 +0200 [thread overview]
Message-ID: <200708052344.12673.mb@bu3sch.de> (raw)
In-Reply-To: <1186343417.8459.23.camel@localhost>
On Sunday 05 August 2007, Mattias Nissler wrote:
> Hi,
>
> we have recently been struggling with getting suspend/resume working in
> rt2x00. A few questions:
There is no suspend/resume support in mac80211.
> 1. What is the recommended scheme for implementing suspend/resume with
> mac80211? Some drivers (p54, iwlwifi) call ieee80211_stop_queues().
Calling stop_queues() from outside of the TX handler may deadlock.
That is a bug in mac80211. I don't think it has been fixed, yet.
> 2. Are there any mac80211 drivers that suspend/resume properly? Also
> when associated?
>
> 3. Shouldn't mac80211 be made suspend/resume-aware (AFAIK it is not), so
> we can do things like disassociating during suspend and reassociating
> when resuming? I'd like something in the spirit of
> netif_device_detach()/netif_device_attach(). Comments?
I think we should have a API call to mac80211 that suspends the stack
(saves the state etc..) and a call the resumes (reassociates, re-handshakes...).
But that's probably not that easy to implement, as parts of this
does happen in userspace.
next prev parent reply other threads:[~2007-08-05 21:44 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-05 19:50 suspend/resume support in mac80211 Mattias Nissler
2007-08-05 21:44 ` Michael Buesch [this message]
2007-08-05 23:09 ` [Rt2400-devel] " Peter Stuge
2007-08-06 9:17 ` Johannes Berg
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