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| author | Tejun Heo <htejun@gmail.com> | 2006-06-24 20:30:19 +0900 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2006-06-26 20:59:27 -0400 |
| commit | 5806db22cffc7557b675d3c9229f327980aee797 (patch) | |
| tree | e3ad9b2b89ad0525a29ba2e94eb4002ee30035ef /include/linux | |
| parent | 77b08fb56a41e84b5e78b14f24d79879235e3337 (diff) | |
| download | linux-stable-5806db22cffc7557b675d3c9229f327980aee797.tar.gz linux-stable-5806db22cffc7557b675d3c9229f327980aee797.tar.bz2 linux-stable-5806db22cffc7557b675d3c9229f327980aee797.zip | |
[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 <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/libata.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h index c227dace1d26..f4284bf89758 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); |