Return-path: Received: from wf-out-1314.google.com ([209.85.200.171]:34355 "EHLO wf-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750959AbZA2GGt (ORCPT ); Thu, 29 Jan 2009 01:06:49 -0500 Received: by wf-out-1314.google.com with SMTP id 27so8517110wfd.4 for ; Wed, 28 Jan 2009 22:06:48 -0800 (PST) MIME-Version: 1.0 In-Reply-To: <20090128170303.32025.21799.stgit@tikku> References: <20090128170215.32025.32389.stgit@tikku> <20090128170303.32025.21799.stgit@tikku> Date: Thu, 29 Jan 2009 11:36:48 +0530 Message-ID: <8e92b4100901282206r64a07a9dtcc44db645d301b28@mail.gmail.com> (sfid-20090129_070702_145344_32FCF142) Subject: Re: [PATCH v3 2/2] mac80211: use ps-poll when dynamic power save mode is disabled From: Vivek Natarajan To: Kalle Valo Cc: johannes@sipsolutions.net, linux-wireless@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-wireless-owner@vger.kernel.org List-ID: On Wed, Jan 28, 2009 at 10:33 PM, Kalle Valo wrote: > + * Here is assumed that the driver will be > + * able to send ps-poll frame and receive a > + * response even though power save mode is > + * enabled, but some drivers might require > + * to disable power save here. This needs > + * to be investigated. ath9k too needs power save to be disabled to send or receive any frame. Same as broadcom. I hope it is the same for many others too. I'm curious about the design of stlc45xx/p54 since it is capable of sending/receiving even though power save is enabled. I wonder what blocks of the hw are off when ps is enabled since it is capable of doing the basic operation of Tx/Rx which is the only thing expected from a driver. I seriously doubt if NIC is saving any power at all or the hw design is very novel and interesting. Thanks, Vivek.