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>
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 @@
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.