[libata] Remove ->irq_ack() hook, and ata_dummy_irq_on()

* ->irq_ack() is redundant to what the irq handler already
  performs... chk-status + irq-clear.  Furthermore, it is only
  called in one place, when screaming-irq-debugging is enabled,
  so we don't want to bother with a hook just for that.

* ata_dummy_irq_on() is only ever used in drivers that have
  no callpath reaching ->irq_on().  Remove .irq_on hook from
  those drivers, and the now-unused ata_dummy_irq_on()

Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 0 insertions, 4 deletions

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index baf7d0562190..c888c966a020 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -276,8 +276,6 @@ static const struct ata_port_operations ahci_ops = {
         .qc_issue               = ahci_qc_issue,
 
         .irq_clear              = ahci_irq_clear,
-        .irq_on                 = ata_dummy_irq_on,
-        .irq_ack                = ata_dummy_irq_ack,
 
         .scr_read               = ahci_scr_read,
         .scr_write              = ahci_scr_write,
@@ -310,8 +308,6 @@ static const struct ata_port_operations ahci_vt8251_ops = {
         .qc_issue               = ahci_qc_issue,
 
         .irq_clear              = ahci_irq_clear,
-        .irq_on                 = ata_dummy_irq_on,
-        .irq_ack                = ata_dummy_irq_ack,
 
         .scr_read               = ahci_scr_read,
         .scr_write              = ahci_scr_write,