diff options
| author | Mark Lord <liml@rtr.ca> | 2009-01-19 18:06:28 -0500 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2009-01-26 06:37:00 -0500 |
| commit | cd12e1f7a2c28917c89d65c0d4a52d3919b4c125 (patch) | |
| tree | ef292f2e4ac25682297ce2da4258fe867ec07c23 /drivers/ata/sata_mv.c | |
| parent | cae6edc3b5a536119374a5439d9b253cb26f05e1 (diff) | |
sata_mv: remove bogus nsect restriction
Remove unneeded nsect restriction from GenII NCQ path,
and improve comments to explain why this is not a problem.
Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata/sata_mv.c')
| -rw-r--r-- | drivers/ata/sata_mv.c | 13 |
1 files changed, 2 insertions, 11 deletions
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c index 68096289074..874b60b2e20 100644 --- a/drivers/ata/sata_mv.c +++ b/drivers/ata/sata_mv.c @@ -349,8 +349,6 @@ enum { EDMA_HALTCOND_OFS = 0x60, /* GenIIe halt conditions */ - GEN_II_NCQ_MAX_SECTORS = 256, /* max sects/io on Gen2 w/NCQ */ - /* Host private flags (hp_flags) */ MV_HP_FLAG_MSI = (1 << 0), MV_HP_ERRATA_50XXB0 = (1 << 1), @@ -1093,20 +1091,12 @@ static void mv6_dev_config(struct ata_device *adev) * * Gen-II does not support NCQ over a port multiplier * (no FIS-based switching). - * - * We don't have hob_nsect when doing NCQ commands on Gen-II. - * See mv_qc_prep() for more info. */ if (adev->flags & ATA_DFLAG_NCQ) { if (sata_pmp_attached(adev->link->ap)) { adev->flags &= ~ATA_DFLAG_NCQ; ata_dev_printk(adev, KERN_INFO, "NCQ disabled for command-based switching\n"); - } else if (adev->max_sectors > GEN_II_NCQ_MAX_SECTORS) { - adev->max_sectors = GEN_II_NCQ_MAX_SECTORS; - ata_dev_printk(adev, KERN_INFO, - "max_sectors limited to %u for NCQ\n", - adev->max_sectors); } } } @@ -1444,7 +1434,8 @@ static void mv_qc_prep(struct ata_queued_cmd *qc) * only 11 bytes...so we must pick and choose required * registers based on the command. So, we drop feature and * hob_feature for [RW] DMA commands, but they are needed for - * NCQ. NCQ will drop hob_nsect. + * NCQ. NCQ will drop hob_nsect, which is not needed there + * (nsect is used only for the tag; feat/hob_feat hold true nsect). */ switch (tf->command) { case ATA_CMD_READ: |