Return-path: Received: from mail-lb0-f177.google.com ([209.85.217.177]:64940 "EHLO mail-lb0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750780AbbA2WHf convert rfc822-to-8bit (ORCPT ); Thu, 29 Jan 2015 17:07:35 -0500 Received: by mail-lb0-f177.google.com with SMTP id p9so33158303lbv.8 for ; Thu, 29 Jan 2015 14:07:33 -0800 (PST) MIME-Version: 1.0 In-Reply-To: <1422566048629.36984@mail.polimi.it> References: <1422566048629.36984@mail.polimi.it> Date: Thu, 29 Jan 2015 23:07:33 +0100 Message-ID: (sfid-20150129_230738_306721_093A407D) Subject: Re: "iw": two small questions From: =?UTF-8?B?UmFmYcWCIE1pxYJlY2tp?= To: Stefano Cappa Cc: "linux-wireless@vger.kernel.org" Content-Type: text/plain; charset=UTF-8 Sender: linux-wireless-owner@vger.kernel.org List-ID: On 29 January 2015 at 22:14, Stefano Cappa wrote: > 1) It's possibile that "iw phy phy0 info" said that i can use a particular combination of interfaces in "Valid interface combinations" but on my device i can't use this combination? If yes, the problem is with the driver of this device? Could happen. @add_virtual_intf (see struct cfg80211_ops) can fail. > 2) How iw obtains the information to print "Valid interface combinations"? iw asks this information to the driver/hardware/or something else ? See "struct wiphy" and its const struct ieee80211_iface_combination *iface_combinations; -- Rafał