Return-path: Received: from charlotte.tuxdriver.com ([70.61.120.58]:59659 "EHLO smtp.tuxdriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751226Ab0JGSPJ (ORCPT ); Thu, 7 Oct 2010 14:15:09 -0400 Date: Thu, 7 Oct 2010 14:04:21 -0400 From: "John W. Linville" To: Johannes Berg Cc: "Guy, Wey-Yi" , "linux-wireless@vger.kernel.org" , "ipw3945-devel@lists.sourceforge.net" Subject: Re: [PATCH 1/6] iwlwifi: schedule to deprecate software scan support Message-ID: <20101007180421.GC20950@tuxdriver.com> References: <1286378593-7509-1-git-send-email-wey-yi.w.guy@intel.com> <1286378593-7509-2-git-send-email-wey-yi.w.guy@intel.com> <20101006173609.GH2472@tuxdriver.com> <1286387500.12594.24.camel@wwguy-ubuntu> <20101006190343.GI2472@tuxdriver.com> <1286440790.3657.28.camel@jlt3.sipsolutions.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <1286440790.3657.28.camel@jlt3.sipsolutions.net> Sender: linux-wireless-owner@vger.kernel.org List-ID: On Thu, Oct 07, 2010 at 10:39:50AM +0200, Johannes Berg wrote: > On Wed, 2010-10-06 at 15:03 -0400, John W. Linville wrote: > > > > The current HW scan implementation was improve a lot and sw scan will > > > cause problem, especially once we introduce P2P. > > > > What support issues are caused by supporting software scanning? > > > > Whatever issues are caused by scanning with P2P, doesn't mac80211 > > have to handle them anyway? > > Technically, yes, but there are some things it doesn't handle today, and > there are some things in mac80211's scan implementation that > unfortunately make our firmware somewhat unhappy. Also, when we have two > virtual interfaces (for p2p) the firmware can get completely confused by > a software scan, especially when we were operating as a p2p-GO. > > But isn't this the wrong way around -- shouldn't you be arguing why it > should be kept and dig out bug reports about the HW scan implementation > that weren't addressed? ;-) Hmmm...not so sure about that. Alan Cox has been quoted as saying "a maintainer's job is to say no". I suppose we can argue about this again when you actually try to remove the option... John -- John W. Linville Someday the world will need a hero, and you linville@tuxdriver.com might be all we have. Be ready.