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@xxxxxxxxx>
---
include/linux/libata.h | 14 ++++++++++++++
1 files changed, 14 insertions(+), 0 deletions(-)
af0dd1d6c6651ab9e8e3a9d8e7264daf57eff032
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 20b1cf5..3afd009 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -887,6 +887,9 @@ static inline unsigned int ata_tag_inter
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;
@@ -917,6 +920,17 @@ static inline unsigned int ata_dev_absen
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);
--
1.3.2
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