From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: [RFT] major libata update Date: Wed, 17 May 2006 19:48:30 -0400 Message-ID: <446BB64E.1060509@garzik.org> References: <20060515170006.GA29555@havoc.gtf.org> <3aa654a40605151630j53822ba1nbb1a2e3847a78025@mail.gmail.com> <446914C7.1030702@garzik.org> <3aa654a40605152036h40fa1cd0x8edd81431c1bd22d@mail.gmail.com> <44694C4F.3000008@garzik.org> <3aa654a40605152133x516581f9w62c7cb7709864fb0@mail.gmail.com> <87ves44qrs.fsf@duaron.myhome.or.jp> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from srv5.dvmed.net ([207.36.208.214]:21198 "EHLO mail.dvmed.net") by vger.kernel.org with ESMTP id S1750740AbWEQXsh (ORCPT ); Wed, 17 May 2006 19:48:37 -0400 In-Reply-To: Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Linus Torvalds Cc: OGAWA Hirofumi , Avuton Olrich , linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org, akpm@osdl.org Linus Torvalds wrote: > In particular, I have this pretty strong memory that we tried to do > something like this a long time ago, and it caused problems at least > with the legacy ISA/ATA interrupts (irq 14/15). > > On the other hand, my memory is pretty damn bad at times, and besides, I > hope that that "hardcoded" case just above it is the one that takes care > of the old ATA interrupts. This is one of those times when the only > guaranteed right thing to do would be to be bug-for-bug compatible with > whatever crud MS-Win does.. Many BIOS ACPI tables from years ago simply _assumed_ that you have hardcoded irq 14/15, even... Their irq descriptors for 14/15 would be absent or completely non-functional. Or maybe its the $pirq table I'm recalling. One of the two, anyway. Jeff