From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261605AbUKSVzR (ORCPT ); Fri, 19 Nov 2004 16:55:17 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261622AbUKSVyW (ORCPT ); Fri, 19 Nov 2004 16:54:22 -0500 Received: from zcars04e.nortelnetworks.com ([47.129.242.56]:4277 "EHLO zcars04e.nortelnetworks.com") by vger.kernel.org with ESMTP id S261606AbUKSVvm (ORCPT ); Fri, 19 Nov 2004 16:51:42 -0500 Message-ID: <419E6AEA.3060207@nortelnetworks.com> Date: Fri, 19 Nov 2004 15:51:38 -0600 X-Sybari-Space: 00000000 00000000 00000000 00000000 From: Chris Friesen User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040113 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Linux kernel Subject: question on accessing device nodes for drivers that are not loaded Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I'm working on 2.6.9. I wrote a driver as a module that binds in as a misc char device. I created the node for it manually, tested loading/unloading, running, etc. Then I unloaded the driver, and tried running my little test app. It appears to have hung on the call to open the device node (for which there was no driver loaded). Top shows it in D state. Then I went to load the driver module, and the insmod command hung with a refcount of 1. Is this expected behaviour? Chris