diff options
author | Jens Axboe <jens.axboe@oracle.com> | 2008-10-27 14:23:06 -0400 |
---|---|---|
committer | Jens Axboe <jens.axboe@oracle.com> | 2008-10-27 14:25:30 -0400 |
commit | 43a49cbdf31e812c0d8f553d433b09b421f5d52c (patch) | |
tree | be1e56a51d9a35c1414f26a8d30badc4c4256662 /drivers/ata/libata-scsi.c | |
parent | 3070f69b66b7ab2f02d8a2500edae07039c38508 (diff) |
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, | |||
1107 | 1107 | ||
1108 | depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); | 1108 | depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id)); |
1109 | depth = min(ATA_MAX_QUEUE - 1, depth); | 1109 | depth = min(ATA_MAX_QUEUE - 1, depth); |
1110 | |||
1111 | /* | ||
1112 | * If this device is behind a port multiplier, we have | ||
1113 | * to share the tag map between all devices on that PMP. | ||
1114 | * Set up the shared tag map here and we get automatic. | ||
1115 | */ | ||
1116 | if (dev->link->ap->pmp_link) | ||
1117 | scsi_init_shared_tag_map(sdev->host, ATA_MAX_QUEUE - 1); | ||
1118 | |||
1110 | scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); | 1119 | scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); |
1111 | scsi_activate_tcq(sdev, depth); | 1120 | scsi_activate_tcq(sdev, depth); |
1112 | } | 1121 | } |