From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964941AbWFSWGb (ORCPT ); Mon, 19 Jun 2006 18:06:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964942AbWFSWGb (ORCPT ); Mon, 19 Jun 2006 18:06:31 -0400 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:62182 "EHLO lxorguk.ukuu.org.uk") by vger.kernel.org with ESMTP id S964941AbWFSWG3 (ORCPT ); Mon, 19 Jun 2006 18:06:29 -0400 Subject: Re: Linux 2.6.17: IRQ handler mismatch in serial code? From: Alan Cox To: Mark Lord Cc: Chris Rankin , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org In-Reply-To: <44971C95.7050700@rtr.ca> References: <20060619180658.58945.qmail@web52908.mail.yahoo.com> <20060619184706.GH3479@flint.arm.linux.org.uk> <4496FEC2.8050903@rtr.ca> <1150751212.2871.44.camel@localhost.localdomain> <44971C95.7050700@rtr.ca> Content-Type: text/plain Content-Transfer-Encoding: 7bit Date: Mon, 19 Jun 2006 23:21:41 +0100 Message-Id: <1150755701.2871.49.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.6.2 (2.6.2-1.fc5.5) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Ar Llu, 2006-06-19 am 17:52 -0400, ysgrifennodd Mark Lord: > > This is not the case for ISA bus. Most ISA hardware is physically unable > > to share and the drivers for such hardware intentionally grab the IRQ at > > load time to avoid it being mis-reused. > > Eh? The vast majority of ISA bus devices have open-collector IRQ lines, Not in my experience. In the network work at least very few are, they all drive the chip lines all the time. Thats why Don Becker made sure such drivers grab the lines at startup. Those which can share IRQ or move IRQ grab at open Alan