From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Lord Subject: Re: libata bugfix: preserve LBA bit for HDIO_DRIVE_TASK Date: Sat, 31 Mar 2007 12:55:48 -0400 Message-ID: <460E9294.3020005@rtr.ca> References: <20070330205938.984247529@mini.kroah.org> <20070330210659.GK29450@kroah.com> <460D8510.1050102@pobox.com> <460DD725.1040607@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from ottawa-hs-64-26-128-89.s-ip.magma.ca ([64.26.128.89]:1207 "EHLO mail.rtr.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753423AbXCaQzv (ORCPT ); Sat, 31 Mar 2007 12:55:51 -0400 In-Reply-To: <460DD725.1040607@gmail.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Tejun Heo Cc: Jeff Garzik , linux-kernel@vger.kernel.org, alan@lxorguk.ukuu.org.uk, IDE/ATA development list Tejun Heo wrote: > Mark Lord wrote: >> Ideally, this would go into linux-2.6.21. >> >> Preserve the LBA bit in the DevSel/Head register for HDIO_DRIVE_TASK. >> >> Signed-off-by: Mark Lord >> --- >> --- linux/drivers/ata/libata-scsi.c.orig 2007-03-21 >> 13:35:02.000000000 -0400 >> +++ linux/drivers/ata/libata-scsi.c 2007-03-30 17:40:58.000000000 -0400 >> @@ -333,7 +333,7 @@ >> scsi_cmd[8] = args[3]; >> scsi_cmd[10] = args[4]; >> scsi_cmd[12] = args[5]; >> - scsi_cmd[13] = args[6] & 0x0f; >> + scsi_cmd[13] = args[6] & 0x4f; >> scsi_cmd[14] = args[0]; >> >> /* Good values for timeout and retries? Values below > > IDE seems to be just overriding devsel (0x10) and leaving the rest > alone. Maybe we should do (args[6] & ~0x10) here? Or is it safer this way? Same thoughts here. I went "conservative" on this one, because the entire field has been all zeros until this patch, and I didn't want to trigger any possible latent bugs in libata. Whatever. Cheers