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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/libata-sff.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/libata-sff.c')
-rw-r--r--drivers/ata/libata-sff.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 20dc572fb45a..1cf03d41aa33 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -303,6 +303,14 @@ void ata_bmdma_irq_clear(struct ata_port *ap)
}
/**
+ * ata_noop_irq_clear - Noop placeholder for irq_clear
+ * @ap: Port associated with this ATA transaction.
+ */
+void ata_noop_irq_clear(struct ata_port *ap)
+{
+}
+
+/**
* ata_bmdma_status - Read PCI IDE BMDMA status
* @ap: Port associated with this ATA transaction.
*