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Commit 5806db22 authored by Tejun Heo's avatar Tejun Heo Committed by Jeff Garzik
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[PATCH] libata: implement ata_port_max_devices() 



Implement ata_port_max_devices().  This function returns the number of
possible devices on a port.  This will be used by new PM
implementation.

Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 77b08fb5

include/linux/libata.h

+14 −0
Original line number Diff line number Diff line
@@ -888,6 +888,9 @@ static inline unsigned int ata_tag_internal(unsigned int tag) 
	return tag == ATA_MAX_QUEUE - 1;

}



/*

 * device helpers

 */

static inline unsigned int ata_class_enabled(unsigned int class)

{

	return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
@@ -918,6 +921,17 @@ static inline unsigned int ata_dev_absent(const struct ata_device *dev) 
	return ata_class_absent(dev->class);

}



/*

 * port helpers

 */

static inline int ata_port_max_devices(const struct ata_port *ap)

{

	if (ap->flags & ATA_FLAG_SLAVE_POSS)

		return 2;

	return 1;

}





static inline u8 ata_chk_status(struct ata_port *ap)

{

	return ap->ops->check_status(ap);