From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alan Cox Subject: Re: Linux 2.6.17: IRQ handler mismatch in serial code? Date: Mon, 19 Jun 2006 23:21:41 +0100 Message-ID: <1150755701.2871.49.camel@localhost.localdomain> 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> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: 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 In-Reply-To: <44971C95.7050700@rtr.ca> Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: Mark Lord Cc: Chris Rankin , linux-kernel@vger.kernel.org, linux-serial@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