[PATCH 09/13] scsi: alua: Add scsi_alua_handle_state_transition()

[John Garry]

Add an equivalent of alua_handle_state_transition() from scsi_dh_alua.c

Signed-off-by: John Garry <john.g.ga...@oracle.com>
---
 drivers/scsi/scsi_alua.c | 11 +++++++++++
 include/scsi/scsi_alua.h |  5 +++++
 2 files changed, 16 insertions(+)

diff --git a/drivers/scsi/scsi_alua.c b/drivers/scsi/scsi_alua.c
index 9c317e60d031e..d19d1845bc324 100644
--- a/drivers/scsi/scsi_alua.c
+++ b/drivers/scsi/scsi_alua.c
@@ -40,6 +40,17 @@ static struct workqueue_struct *kalua_wq;
 #define ALUA_RTPG_DELAY_MSECS          5
 #define ALUA_RTPG_RETRY_DELAY          2
 
+void scsi_alua_handle_state_transition(struct scsi_device *sdev)
+{
+       struct alua_data *alua = sdev->alua;
+       unsigned long flags;
+
+       spin_lock_irqsave(&alua->lock, flags);
+       alua->state = SCSI_ACCESS_STATE_TRANSITIONING;
+       spin_unlock_irqrestore(&alua->lock, flags);
+}
+EXPORT_SYMBOL_GPL(scsi_alua_handle_state_transition);
+
 /*
  * alua_tur - Send a TEST UNIT READY
  * @sdev: device to which the TEST UNIT READY command should be send
diff --git a/include/scsi/scsi_alua.h b/include/scsi/scsi_alua.h
index 2e664f20d9681..5b3a12861658f 100644
--- a/include/scsi/scsi_alua.h
+++ b/include/scsi/scsi_alua.h
@@ -30,6 +30,8 @@ struct alua_data {
 int scsi_alua_sdev_init(struct scsi_device *sdev);
 void scsi_alua_sdev_exit(struct scsi_device *sdev);
 
+void scsi_alua_handle_state_transition(struct scsi_device *sdev);
+
 int scsi_alua_check_tpgs(struct scsi_device *sdev);
 
 int scsi_alua_rtpg_run(struct scsi_device *sdev);
@@ -39,6 +41,9 @@ int scsi_alua_init(void);
 void scsi_exit_alua(void);
 #else //CONFIG_SCSI_ALUA
 
+static inline void scsi_alua_handle_state_transition(struct scsi_device *sdev)
+{
+}
 static inline int scsi_alua_check_tpgs(struct scsi_device *sdev)
 {
        return 0;
-- 
2.43.5