libata: fix NCQ devices behind port multipliers
For devices behind sata port multipliers, we have to make sure that they share a tag map since all tags for that PMP must be unique. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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@ -1107,6 +1107,15 @@ static int ata_scsi_dev_config(struct scsi_device *sdev,
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depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
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depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
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depth = min(ATA_MAX_QUEUE - 1, depth);
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depth = min(ATA_MAX_QUEUE - 1, depth);
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/*
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* If this device is behind a port multiplier, we have
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* to share the tag map between all devices on that PMP.
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* Set up the shared tag map here and we get automatic.
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*/
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if (dev->link->ap->pmp_link)
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scsi_init_shared_tag_map(sdev->host, ATA_MAX_QUEUE - 1);
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scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
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scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
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scsi_activate_tcq(sdev, depth);
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scsi_activate_tcq(sdev, depth);
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}
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}
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