[PATCH v10 1/2] scsi: libsas: Add sas_ex_phy_to_dev() helper

[Xingui Yang <yangxingui@huawei.com>]

Add sas_ex_phy_to_dev() to return any device type attached to an
expander phy, and refactor sas_ex_to_ata() to use it.

No functional changes intended.

Signed-off-by: Xingui Yang <yangxingui@huawei.com>
---
 drivers/scsi/libsas/sas_expander.c | 13 +++++++++----
 drivers/scsi/libsas/sas_internal.h |  1 +
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index f471ab464a78..a5c5327cd0dd 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -345,11 +345,10 @@ static void sas_set_ex_phy(struct domain_device *dev, int phy_id,
 		 SAS_ADDR(phy->attached_sas_addr), type);
 }
 
-/* check if we have an existing attached ata device on this expander phy */
-struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id)
+/* Return the domain device attached to an expander phy */
+struct domain_device *sas_ex_phy_to_dev(struct domain_device *ex_dev, int phy_id)
 {
 	struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy_id];
-	struct domain_device *dev;
 	struct sas_rphy *rphy;
 
 	if (!ex_phy->port)
@@ -359,7 +358,13 @@ struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id)
 	if (!rphy)
 		return NULL;
 
-	dev = sas_find_dev_by_rphy(rphy);
+	return sas_find_dev_by_rphy(rphy);
+}
+
+/* Check if we have an existing attached ata device on this expander phy */
+struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id)
+{
+	struct domain_device *dev = sas_ex_phy_to_dev(ex_dev, phy_id);
 
 	if (dev && dev_is_sata(dev))
 		return dev;
diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h
index 7dce0f587149..f5c75ab10dc4 100644
--- a/drivers/scsi/libsas/sas_internal.h
+++ b/drivers/scsi/libsas/sas_internal.h
@@ -91,6 +91,7 @@ int sas_smp_get_phy_events(struct sas_phy *phy);
 
 void sas_device_set_phy(struct domain_device *dev, struct sas_port *port);
 struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy);
+struct domain_device *sas_ex_phy_to_dev(struct domain_device *ex_dev, int phy_id);
 struct domain_device *sas_ex_to_ata(struct domain_device *ex_dev, int phy_id);
 int sas_ex_phy_discover(struct domain_device *dev, int single);
 int sas_get_report_phy_sata(struct domain_device *dev, int phy_id,
-- 
2.43.0