From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 29 Jun 2001 14:00:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 29 Jun 2001 14:00:36 -0400 Received: from [194.213.32.142] ([194.213.32.142]:9988 "EHLO bug.ucw.cz") by vger.kernel.org with ESMTP id ; Fri, 29 Jun 2001 13:59:25 -0400 Message-ID: <20010629005419.H525@bug.ucw.cz> Date: Fri, 29 Jun 2001 00:54:19 +0200 From: Pavel Machek To: Matthias Urlichs , Alan Cox , D.A.Fedorov@inp.nsk.su Cc: Balbir Singh , linux-kernel@vger.kernel.org Subject: Re: Is it useful to support user level drivers In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.93i In-Reply-To: ; from Matthias Urlichs on Thu, Jun 21, 2001 at 04:03:49PM +0200 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi! > >No. The IRQ might be shared, and you get a slight problem if you just disabled > >an IRQ needed to make progress for user space to handle the IRQ > > Two choices: > > - Disallow shared interrupts for usermode drivers. That's hard... If you your notebook comes with soundcard and ltmodem sharing the irq, and ltmodem only has userspace driver, you are screwed. Pavel -- I'm pavel@ucw.cz. "In my country we have almost anarchy and I don't care." Panos Katsaloulis describing me w.r.t. patents at discuss@linmodems.org