linux-kernel - Re: [cfg80211 / iwlwifi] setting wireless regulatory domain doesn't work.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 18 Dec 2013 10:16:38 +0100
From:	Arend van Spriel <arend@...adcom.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Sander Eikelenboom <linux@...elenboom.it>
CC:	Ben Hutchings <ben@...adent.org.uk>,
	Julian Calaby <julian.calaby@...il.com>,
	"Luis R. Rodriguez" <mcgrof@...not-panic.com>,
	"Berg, Johannes" <johannes.berg@...el.com>,
	"Grumbach, Emmanuel" <emmanuel.grumbach@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"ilw@...ux.intel.com" <ilw@...ux.intel.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	"John W. Linville" <linville@...driver.com>,
	Avinash Patil <avinashapatil@...il.com>
Subject: Re: [cfg80211 / iwlwifi] setting wireless regulatory domain doesn't
 work.

On 12/17/2013 11:06 PM, Linus Torvalds wrote:
> We have literally had this *exact* same issue with firmware loading.
> Network drivers shouldn't try to load firmware at module load time.
> Same deal.

It is kind of a chicken and egg problem for (wireless) networking
drivers. To get IFF_UP from the network layer you have to register a
netdevice. For wireless drivers this means you have to register a wiphy
device with cfg80211 which flags capabilities and optionally are custom
regulatory domain. That information depends on the device and firmware
used. And there we have a full circle.

Regards,
Arend
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/