Subject: Re: [PATCH 2/2] zd1211rw: enable an AP that can't support fully PS
	clients (wireless-testing).
From: Johannes Berg <johannes@sipsolutions.net>
To: Rami Rosen <ramirose@gmail.com>
Cc: linville@tuxdriver.com, linux-wireless@vger.kernel.org, j@w1.fi,
	Daniel Drake <dsd@gentoo.org>
In-Reply-To: <eb3ff54b0811240309u31944469xa444ee25f8ac8496@mail.gmail.com> (sfid-20081124_120908_115398_E83F0212)
References: <eb3ff54b0811232344t665fe6abp9ca2be85cfcbd855@mail.gmail.com>
	 <1227522918.3599.63.camel@johannes.berg>
	 <eb3ff54b0811240309u31944469xa444ee25f8ac8496@mail.gmail.com>
	 (sfid-20081124_120908_115398_E83F0212)
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Date: Mon, 24 Nov 2008 12:21:34 +0100
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On Mon, 2008-11-24 at 13:09 +0200, Rami Rosen wrote:

> If you are talking about whether the zd1211 driver can buffer
> mcast/bcast frames in software, it seems to me that the answer is
> negative, since there is no call for ieee80211_get_buffered_bc() in
> the zd1211rw driver code and also there is no handling of
> IEEE80211_TX_CTL_SEND_AFTER_DTIM or
> IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING in the zd1211rw driver code.
> This what made me add the NL80211_ATTR_WIPHY_AP_PS_CHALLENGED
> attribute and prepare this patch.

Yes, I know that's why you did it, but I'm still wondering whether it
was necessary, is it really impossible to implement mcast/bcast
buffering with this hardware? IOW, can we fix the driver to do the
buffering and using _get_buffered_bc()?

johannes

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