libata: normalize port_info, port_operations and sht tables

Over the time, port info, ops and sht structures developed quite a bit
of inconsistencies.  This patch updates drivers.

* Enable/disable_pm callbacks added to all ahci ops tables.

* Every driver for SFF controllers now uses ata_sff_port_start()
  instead of ata_port_start() unless the driver has custom
  implementation.

* Every driver for SFF controllers now uses ata_pci_default_filter()
  unless the driver has custom implementation.

* Removed an odd port_info->sht initialization from ata_piix.c.
  Likely a merge byproduct.

* A port which has ATA_FLAG_SATA set doesn't need to set cable_detect
  to ata_cable_sata().  Remove it from via and mv port ops.

* Some drivers had unnecessary .max_sectors initialization which is
  ignored and was missing .slave_destroy callback.  Fixed.

* Removed unnecessary sht initializations port_info's.

* Removed onsolete scsi device suspend/resume callbacks from
  pata_bf54x.

* No reason to set ata_pci_default_filter() and bmdma functions for
  PIO-only drivers.  Remove those callbacks and replace
  ata_bmdma_irq_clear with ata_noop_irq_clear.

* pata_platform sets port_start to ata_dummy_ret0.  port_start can
  just be set to NULL.

* sata_fsl supports NCQ but was missing qc_defer.  Fixed.

* pata_rb600_cf implements dummy port_start.  Removed.

Signed-off-by: Tejun Heo <htejun@gmail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/ata/sata_svw.c b/drivers/ata/sata_svw.c
index 019e367b59fc..aa690142fa90 100644
--- a/drivers/ata/sata_svw.c
+++ b/drivers/ata/sata_svw.c
@@ -362,6 +362,7 @@ static const struct ata_port_operations k2_sata_ops = {
         .qc_prep                = ata_qc_prep,
         .qc_issue               = ata_qc_issue_prot,
         .data_xfer              = ata_data_xfer,
+        .mode_filter            = ata_pci_default_filter,
         .freeze                 = ata_bmdma_freeze,
         .thaw                   = ata_bmdma_thaw,
         .error_handler          = ata_bmdma_error_handler,
@@ -370,7 +371,7 @@ static const struct ata_port_operations k2_sata_ops = {
         .irq_on                 = ata_irq_on,
         .scr_read               = k2_sata_scr_read,
         .scr_write              = k2_sata_scr_write,
-        .port_start             = ata_port_start,
+        .port_start             = ata_sff_port_start,
 };
 
 static const struct ata_port_info k2_port_info[] = {