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libata: separate out ata_ncq_enabled()

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Separate out ata_ncq_enabled().

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo
2007-02-20 23:20:27 +09:00
committed by Jeff Garzik
parent 4c90d9717a
commit 6d1245bf29
2 changed files with 16 additions and 3 deletions
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15
include/linux/libata.h
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@@ -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.