From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: [PATCH 04/14] libata-hp-prep: update ata_scsi_find_dev() and friends Date: Fri, 12 May 2006 00:02:34 +0900 Message-ID: <1147359754709-git-send-email-htejun@gmail.com> References: <11473597542442-git-send-email-htejun@gmail.com> Reply-To: Tejun Heo Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Return-path: Received: from nz-out-0102.google.com ([64.233.162.203]:37318 "EHLO nz-out-0102.google.com") by vger.kernel.org with ESMTP id S1751825AbWEKPCl (ORCPT ); Thu, 11 May 2006 11:02:41 -0400 Received: by nz-out-0102.google.com with SMTP id 13so222099nzn for ; Thu, 11 May 2006 08:02:41 -0700 (PDT) In-Reply-To: <11473597542442-git-send-email-htejun@gmail.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: jgarzik@pobox.com, alan@lxorguk.ukuu.org.uk, axboe@suse.de, albertcc@tw.ibm.com, forrest.zhao@intel.com, efalk@google.com, linux-ide@vger.kernel.org Cc: Tejun Heo Separate out ata_find_dev() and __ata_scsi_find_dev() from ata_scsi_find_dev(). ata_find_dev() checks ATA_FLAG_SLAVE_POSS for id==1 case, so all three functions return NULL if id==1 is specified for !SLAVE_POSS port. These will be used by later hotplug implementation. --- drivers/scsi/libata-scsi.c | 40 +++++++++++++++++++++++++--------------- 1 files changed, 25 insertions(+), 15 deletions(-) 9ac5a3ff896cfe11b51d5e781f2b4e2137b10142 diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index 996058a..bb40309 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -52,8 +52,12 @@ #define SECTOR_SIZE 512 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd); -static struct ata_device * -ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev); + +static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap, + const struct scsi_device *scsidev); +static struct ata_device * ata_scsi_find_dev(struct ata_port *ap, + const struct scsi_device *scsidev); + #define RW_RECOVERY_MPAGE 0x1 #define RW_RECOVERY_MPAGE_LEN 12 @@ -2308,6 +2312,23 @@ static unsigned int atapi_xlat(struct at return 0; } +static struct ata_device * ata_find_dev(struct ata_port *ap, int id) +{ + if (likely(id == 0 || (id == 1 && ap->flags & ATA_FLAG_SLAVE_POSS))) + return &ap->device[id]; + return NULL; +} + +static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap, + const struct scsi_device *scsidev) +{ + /* skip commands not addressed to targets we simulate */ + if (unlikely(scsidev->channel || scsidev->lun)) + return NULL; + + return ata_find_dev(ap, scsidev->id); +} + /** * ata_scsi_find_dev - lookup ata_device from scsi_cmnd * @ap: ATA port to which the device is attached @@ -2324,23 +2345,12 @@ static unsigned int atapi_xlat(struct at * RETURNS: * Associated ATA device, or %NULL if not found. */ - static struct ata_device * ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) { - struct ata_device *dev; - - /* skip commands not addressed to targets we simulate */ - if (likely(scsidev->id < ATA_MAX_DEVICES)) - dev = &ap->device[scsidev->id]; - else - return NULL; - - if (unlikely((scsidev->channel != 0) || - (scsidev->lun != 0))) - return NULL; + struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev); - if (unlikely(!ata_dev_enabled(dev))) + if (unlikely(!dev || !ata_dev_enabled(dev))) return NULL; if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) { -- 1.2.4