From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH] fix hostap registration order Date: Thu, 09 Dec 2010 19:53:15 -0800 (PST) Message-ID: <20101209.195315.193716225.davem@davemloft.net> References: Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, j@w1.fi, linux-wireless@vger.kernel.org To: mroos@linux.ee Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:52666 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753877Ab0LJDwr (ORCPT ); Thu, 9 Dec 2010 22:52:47 -0500 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: From: Meelis Roos Date: Fri, 10 Dec 2010 01:19:23 +0200 (EET) > In 2.6.37-rc4, hostap_pci init gives a WARNING with backtrace telling > that netif_stop_queue is called before register_netdev. Fix it by moving > this call after register_netdev. Removes the warning and seems to work, > but why is the call to netif_stop_queue needed at all after > register_netdev? > > Signed-off-by: Meelis Roos It should simply not touch the queue state at all at this point. Your change would add a race. At the moment the device is registered it can be brought up, and then your code will eroneously modify the queue state.