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| author | Jens Axboe <jens.axboe@oracle.com> | 2008-10-27 21:23:06 +0300 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-10-27 21:25:30 +0300 |
| commit | 43a49cbdf31e812c0d8f553d433b09b421f5d52c (patch) | |
| tree | be1e56a51d9a35c1414f26a8d30badc4c4256662 /drivers/ata/libata-scsi.c | |
| parent | 3070f69b66b7ab2f02d8a2500edae07039c38508 (diff) | |
| download | linux-43a49cbdf31e812c0d8f553d433b09b421f5d52c.tar.xz | |
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>
Diffstat (limited to 'drivers/ata/libata-scsi.c')
| -rw-r--r-- | drivers/ata/libata-scsi.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 4b95c4387e9e..bbb30d882f05 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -1107,6 +1107,15 @@ static int ata_scsi_dev_config(struct scsi_device *sdev, depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); depth = min(ATA_MAX_QUEUE - 1, depth); + + /* + * If this device is behind a port multiplier, we have + * to share the tag map between all devices on that PMP. + * Set up the shared tag map here and we get automatic. + */ + if (dev->link->ap->pmp_link) + scsi_init_shared_tag_map(sdev->host, ATA_MAX_QUEUE - 1); + scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); scsi_activate_tcq(sdev, depth); } |