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, 1 insertions, 8 deletions

diff --git a/drivers/ata/pata_rb500_cf.c b/drivers/ata/pata_rb500_cf.c
index 08c32af1c84d..22cb9e1a02f5 100644
--- a/drivers/ata/pata_rb500_cf.c
+++ b/drivers/ata/pata_rb500_cf.c
@@ -117,11 +117,6 @@ static irqreturn_t rb500_pata_irq_handler(int irq, void *dev_instance)
         return IRQ_HANDLED;
 }
 
-static int rb500_pata_port_start(struct ata_port *ap)
-{
-        return 0;
-}
-
 static struct ata_port_operations rb500_pata_port_ops = {
         .tf_load                = ata_tf_load,
         .tf_read                = ata_tf_read,
@@ -138,12 +133,10 @@ static struct ata_port_operations rb500_pata_port_ops = {
         .freeze                 = rb500_pata_freeze,
         .thaw                   = rb500_pata_thaw,
         .error_handler          = ata_bmdma_error_handler,
+        .post_internal_cmd      = ata_bmdma_post_internal_cmd,
 
-        .irq_handler            = rb500_pata_irq_handler,
         .irq_clear              = ata_noop_irq_clear,
         .irq_on                 = ata_irq_on,
-
-        .port_start             = rb500_pata_port_start,
 };
 
 /* ------------------------------------------------------------------------ */