[PATCH] libata-hp-prep: update ata_scsi_find_dev() and friends
Separate out ata_find_dev() and __ata_scsi_find_dev() from ata_scsi_find_dev(). These will be used by later hotplug implementation. Signed-off-by: Tejun Heo <htejun@gmail.com>
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@ -52,8 +52,12 @@
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#define SECTOR_SIZE 512
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typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd);
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static struct ata_device *
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ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev);
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static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
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const struct scsi_device *scsidev);
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static struct ata_device * ata_scsi_find_dev(struct ata_port *ap,
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const struct scsi_device *scsidev);
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#define RW_RECOVERY_MPAGE 0x1
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#define RW_RECOVERY_MPAGE_LEN 12
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@ -2308,6 +2312,23 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
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return 0;
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}
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static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
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{
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if (likely(id < ATA_MAX_DEVICES))
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return &ap->device[id];
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return NULL;
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}
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static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
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const struct scsi_device *scsidev)
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{
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/* skip commands not addressed to targets we simulate */
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if (unlikely(scsidev->channel || scsidev->lun))
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return NULL;
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return ata_find_dev(ap, scsidev->id);
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}
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/**
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* ata_scsi_find_dev - lookup ata_device from scsi_cmnd
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* @ap: ATA port to which the device is attached
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@ -2324,23 +2345,12 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
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* RETURNS:
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* Associated ATA device, or %NULL if not found.
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*/
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static struct ata_device *
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ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
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{
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struct ata_device *dev;
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struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
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/* skip commands not addressed to targets we simulate */
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if (likely(scsidev->id < ATA_MAX_DEVICES))
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dev = &ap->device[scsidev->id];
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else
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return NULL;
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if (unlikely((scsidev->channel != 0) ||
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(scsidev->lun != 0)))
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return NULL;
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if (unlikely(!ata_dev_enabled(dev)))
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if (unlikely(!dev || !ata_dev_enabled(dev)))
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return NULL;
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if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) {
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