libata: implement and use ata_noop_irq_clear()
->irq_clear() is used to clear IRQ bit of a SFF controller and isn't
useful for drivers which don't use libata SFF HSM implementation.
However, it's a required callback and many drivers implement their own
noop version as placeholder. This patch implements ata_noop_irq_clear
and use it to replace those custom placeholders.
Also, SFF drivers which don't support BMDMA don't need to use
ata_bmdma_irq_clear(). It becomes noop if BMDMA address isn't
initialized. Convert them to use ata_noop_irq_clear().
Signed-off-by: Tejun Heo <htejun@gmail.com>
diff --git a/drivers/ata/pata_qdi.c b/drivers/ata/pata_qdi.c
index 9f308ed..60238d5 100644
--- a/drivers/ata/pata_qdi.c
+++ b/drivers/ata/pata_qdi.c
@@ -191,7 +191,7 @@
.data_xfer = qdi_data_xfer,
- .irq_clear = ata_bmdma_irq_clear,
+ .irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
@@ -217,7 +217,7 @@
.data_xfer = qdi_data_xfer,
- .irq_clear = ata_bmdma_irq_clear,
+ .irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,