From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: PATA failure with piix, works with libata Date: Sun, 05 Mar 2006 19:58:09 -0500 Message-ID: <440B8921.9030602@garzik.org> References: <20060303183937.GA30840@srcf.ucam.org> <20060305225733.GA8578@srcf.ucam.org> <440B770A.8090707@garzik.org> <20060306003221.GA8805@srcf.ucam.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail.dvmed.net ([216.237.124.58]:62684 "EHLO mail.dvmed.net") by vger.kernel.org with ESMTP id S1751101AbWCFA6L (ORCPT ); Sun, 5 Mar 2006 19:58:11 -0500 In-Reply-To: <20060306003221.GA8805@srcf.ucam.org> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Matthew Garrett Cc: linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org Matthew Garrett wrote: > On Sun, Mar 05, 2006 at 06:40:58PM -0500, Jeff Garzik wrote: > >>Matthew Garrett wrote: >> >>>Ok, it /seems/ that things are happier (though still not entirely happy) >>>if I explicitly acknowledge the interrupt by writing the dma status >>>register back again. This doesn't seem to be done anywhere in the IDE >>>interrupt routine, but is in the libata one. I'm afraid I don't >>>understand IDE well enough to have any idea what's going on here - is it >>>possible that a piix in native mode (rather than legacy mode) and >>>sharing an interrupt needs some special handling? >> >>ICH definitely needs that irq ack... > > > Yeah, this is an ICH7. I can't find anything in drivers/ide that would > result in it being done, which is why I'm kind of confused. ide_ack_intr > seems to be defined to do nothing on x86 since IDE_ARCH_ACK_INTR isn't > defined there? This is more a piix-specific behavior than an arch-specific behavior. Jeff