1 files changed, 4 insertions, 0 deletions

diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
index 8e402d5a0640..42900fa95a03 100644
--- a/include/scsi/libsas.h
+++ b/include/scsi/libsas.h
@@ -330,6 +330,7 @@ struct sas_ha_event {
 
 enum sas_ha_state {
         SAS_HA_REGISTERED,
+        SAS_HA_DRAINING,
 };
 
 struct sas_ha_struct {
@@ -337,6 +338,8 @@ struct sas_ha_struct {
         struct sas_ha_event ha_events[HA_NUM_EVENTS];
         unsigned long    pending;
 
+        struct list_head  defer_q; /* work queued while draining */
+        struct mutex      drain_mutex;
         unsigned long     state;
         spinlock_t        state_lock;
 
@@ -657,6 +660,7 @@ int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd);
 extern void sas_target_destroy(struct scsi_target *);
 extern int sas_slave_alloc(struct scsi_device *);
 extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
+extern int sas_drain_work(struct sas_ha_struct *ha);
 
 extern int sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
                            struct request *req);