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authorTejun Heo <htejun@gmail.com>2007-02-20 23:20:27 +0900
committerJeff Garzik <jeff@garzik.org>2007-02-21 04:58:18 -0500
commit6d1245bf294e9ea65b3717be9fa0338bfb6ff6c9 (patch)
tree85efbfead0ca76764f83d66151a6124e662d50f6 /include
parent4c90d9717ae27dddf4b02ed7d683e502b539cd1c (diff)
downloadop-kernel-dev-6d1245bf294e9ea65b3717be9fa0338bfb6ff6c9.zip
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libata: separate out ata_ncq_enabled()
Separate out ata_ncq_enabled(). Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/libata.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 5db50fa..5233e47 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1033,6 +1033,21 @@ static inline u8 ata_chk_status(struct ata_port *ap)
return ap->ops->check_status(ap);
}
+/**
+ * ata_ncq_enabled - Test whether NCQ is enabled
+ * @dev: ATA device to test for
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host lock)
+ *
+ * RETURNS:
+ * 1 if NCQ is enabled for @dev, 0 otherwise.
+ */
+static inline int ata_ncq_enabled(struct ata_device *dev)
+{
+ return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
+ ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
+}
/**
* ata_pause - Flush writes and pause 400 nanoseconds.
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