From 5806db22cffc7557b675d3c9229f327980aee797 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Sat, 24 Jun 2006 20:30:19 +0900 Subject: [PATCH] [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: Tejun Heo Signed-off-by: Jeff Garzik --- include/linux/libata.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/include/linux/libata.h b/include/linux/libata.h index c227dace1d2..f4284bf8975 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -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);