Return-path: Received: from mail-pa0-f43.google.com ([209.85.220.43]:44597 "EHLO mail-pa0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756532Ab3J1Pd2 (ORCPT ); Mon, 28 Oct 2013 11:33:28 -0400 Received: by mail-pa0-f43.google.com with SMTP id hz1so7336536pad.16 for ; Mon, 28 Oct 2013 08:33:28 -0700 (PDT) Date: Mon, 28 Oct 2013 08:33:20 -0700 From: Stephen Hemminger To: Johannes Berg Cc: Dan Williams , Pali =?ISO-8859-1?B?Um9o4XI=?= , Luciano Coelho , "John W. Linville" , "David S. Miller" , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, freemangordon@abv.bg, aaro.koskinen@iki.fi, pavel@ucw.cz, sre@ring0.de, joni.lapilainen@gmail.com Subject: Re: [PATCH 16/16] wl1251: Add sysfs file address for setting permanent mac address Message-ID: <20131028083320.63d3259f@nehalam.linuxnetplumber.net> (sfid-20131028_163343_929923_8EF364C1) In-Reply-To: <1382972215.17956.30.camel@jlt4.sipsolutions.net> References: <1382819655-30430-1-git-send-email-pali.rohar@gmail.com> <201310281449.58170@pali> <1382968522.17956.11.camel@jlt4.sipsolutions.net> <201310281500.24159@pali> <1382971562.1542.6.camel@dcbw.foobar.com> <1382972215.17956.30.camel@jlt4.sipsolutions.net> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-wireless-owner@vger.kernel.org List-ID: On Mon, 28 Oct 2013 15:56:55 +0100 Johannes Berg wrote: > On Mon, 2013-10-28 at 09:46 -0500, Dan Williams wrote: > > > If the device doesn't actually *have* a permanent MAC address, then it > > shouldn't be returning one via ethtool, and should return an error for > > ETHTOOL_GPERMADDR. > > There's currently no provision for that, but I agree it would be better > to do so. > > johannes > > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html The current netdevice API handle the case of a device without a permanent MAC address, slightly differently. If device does not have a permanent address, then: 1. dev->addr_assign_type should not be NET_ADDR_PERM 2. when device is registered dev->perm_addr will not be set and retain all zeros value 4. when ethtool gets address it will return all zeros which is not a valid address. This case doesn't seem to be handled threo mac80211 API's