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authorTejun Heo <htejun@gmail.com>2008-03-25 06:22:47 +0300
committerJeff Garzik <jgarzik@redhat.com>2008-04-17 23:44:16 +0400
commit358f9a77a668660729e705fde9c3cf69f013aa98 (patch)
treea249660fdd9f252925eff9eaac3ed7836c839f91 /drivers/ata/sata_qstor.c
parentc1bc899f5805771926c9198e2ab4d77122c356a1 (diff)
downloadlinux-358f9a77a668660729e705fde9c3cf69f013aa98.tar.xz
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>
Diffstat (limited to 'drivers/ata/sata_qstor.c')
-rw-r--r--drivers/ata/sata_qstor.c8
1 files changed, 1 insertions, 7 deletions
diff --git a/drivers/ata/sata_qstor.c b/drivers/ata/sata_qstor.c
index 91cc12c82040..3c8e97f251f9 100644
--- a/drivers/ata/sata_qstor.c
+++ b/drivers/ata/sata_qstor.c
@@ -121,7 +121,6 @@ static unsigned int qs_qc_issue(struct ata_queued_cmd *qc);
static int qs_check_atapi_dma(struct ata_queued_cmd *qc);
static void qs_bmdma_stop(struct ata_queued_cmd *qc);
static u8 qs_bmdma_status(struct ata_port *ap);
-static void qs_irq_clear(struct ata_port *ap);
static void qs_freeze(struct ata_port *ap);
static void qs_thaw(struct ata_port *ap);
static void qs_error_handler(struct ata_port *ap);
@@ -157,7 +156,7 @@ static const struct ata_port_operations qs_ata_ops = {
.freeze = qs_freeze,
.thaw = qs_thaw,
.error_handler = qs_error_handler,
- .irq_clear = qs_irq_clear,
+ .irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.scr_read = qs_scr_read,
.scr_write = qs_scr_write,
@@ -211,11 +210,6 @@ static u8 qs_bmdma_status(struct ata_port *ap)
return 0;
}
-static void qs_irq_clear(struct ata_port *ap)
-{
- /* nothing */
-}
-
static inline void qs_enter_reg_mode(struct ata_port *ap)
{
u8 __iomem *chan = qs_mmio_base(ap->host) + (ap->port_no * 0x4000);