isci: End the RNC resumption wait when the RNC is destroyed.

While the RNC is suspended for I/O cleanup, the remote device can be
stopped and the RNC setup for destruction.  These changes accomodate that
case in the abort path.

Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

4 files changed, 33 insertions, 11 deletions

diff --git a/drivers/scsi/isci/host.h b/drivers/scsi/isci/host.h
index 8e8b46322c64..9ab58e0540e7 100644
--- a/drivers/scsi/isci/host.h
+++ b/drivers/scsi/isci/host.h
@@ -340,6 +340,11 @@ static inline struct isci_host *dev_to_ihost(struct domain_device *dev)
         return dev->port->ha->lldd_ha;
 }
 
+static inline struct isci_host *idev_to_ihost(struct isci_remote_device *idev)
+{
+        return dev_to_ihost(idev->domain_dev);
+}
+
 /* we always use protocol engine group zero */
 #define ISCI_PEG 0
 
diff --git a/drivers/scsi/isci/remote_device.c b/drivers/scsi/isci/remote_device.c
index a3a6487264ea..c3aa6c5457b9 100644
--- a/drivers/scsi/isci/remote_device.c
+++ b/drivers/scsi/isci/remote_device.c
@@ -1368,27 +1368,40 @@ static void isci_remote_device_resume_from_abort_complete(void *cbparam)
         wake_up(&ihost->eventq);
 }
 
+static bool isci_remote_device_test_resume_done(
+        struct isci_host *ihost,
+        struct isci_remote_device *idev)
+{
+        unsigned long flags;
+        bool done;
+
+        spin_lock_irqsave(&ihost->scic_lock, flags);
+        done = !test_bit(IDEV_ABORT_PATH_RESUME_PENDING, &idev->flags)
+                || test_bit(IDEV_STOP_PENDING, &idev->flags)
+                || sci_remote_node_context_is_being_destroyed(&idev->rnc);
+        spin_unlock_irqrestore(&ihost->scic_lock, flags);
+
+        return done;
+}
 
 void isci_remote_device_wait_for_resume_from_abort(
         struct isci_host *ihost,
         struct isci_remote_device *idev)
 {
-        dev_dbg(scirdev_to_dev(idev), "%s: starting resume wait: %p\n",
+        dev_dbg(&ihost->pdev->dev, "%s: starting resume wait: %p\n",
                  __func__, idev);
 
         #define MAX_RESUME_MSECS 10000
         if (!wait_event_timeout(ihost->eventq,
-                               (!test_bit(IDEV_ABORT_PATH_RESUME_PENDING,
-                                          &idev->flags)
-                                || test_bit(IDEV_STOP_PENDING, &idev->flags)),
-                               msecs_to_jiffies(MAX_RESUME_MSECS))) {
+                                isci_remote_device_test_resume_done(ihost, idev),
+                                msecs_to_jiffies(MAX_RESUME_MSECS))) {
 
-                dev_warn(scirdev_to_dev(idev), "%s: #### Timeout waiting for "
+                dev_warn(&ihost->pdev->dev, "%s: #### Timeout waiting for "
                          "resume: %p\n", __func__, idev);
         }
         clear_bit(IDEV_ABORT_PATH_RESUME_PENDING, &idev->flags);
 
-        dev_dbg(scirdev_to_dev(idev), "%s: resume wait done: %p\n",
+        dev_dbg(&ihost->pdev->dev, "%s: resume wait done: %p\n",
                  __func__, idev);
 }
 
@@ -1414,7 +1427,7 @@ enum sci_status isci_remote_device_resume_from_abort(
                         idev, isci_remote_device_resume_from_abort_complete,
                         idev);
         spin_unlock_irqrestore(&ihost->scic_lock, flags);
-        if (!destroyed)
+        if (!destroyed && (status == SCI_SUCCESS))
                 isci_remote_device_wait_for_resume_from_abort(ihost, idev);
         else
                 clear_bit(IDEV_ABORT_PATH_RESUME_PENDING, &idev->flags);
diff --git a/drivers/scsi/isci/remote_node_context.c b/drivers/scsi/isci/remote_node_context.c
index f5792a901e02..1910100638a2 100644
--- a/drivers/scsi/isci/remote_node_context.c
+++ b/drivers/scsi/isci/remote_node_context.c
@@ -190,9 +190,13 @@ static void sci_remote_node_context_setup_to_destroy(
         scics_sds_remote_node_context_callback callback,
         void *callback_parameter)
 {
+        struct isci_host *ihost = idev_to_ihost(rnc_to_dev(sci_rnc));
+
         sci_rnc->destination_state = RNC_DEST_FINAL;
         sci_rnc->user_callback     = callback;
         sci_rnc->user_cookie       = callback_parameter;
+
+        wake_up(&ihost->eventq);
 }
 
 /**
diff --git a/drivers/scsi/isci/remote_node_context.h b/drivers/scsi/isci/remote_node_context.h
index 0d4a24d647b4..a703b9ce0c2c 100644
--- a/drivers/scsi/isci/remote_node_context.h
+++ b/drivers/scsi/isci/remote_node_context.h
@@ -229,8 +229,8 @@ int sci_remote_node_context_is_safe_to_abort(
 static inline bool sci_remote_node_context_is_being_destroyed(
         struct sci_remote_node_context *sci_rnc)
 {
-        return ((sci_rnc->sm.current_state_id == SCI_RNC_INVALIDATING)
-                && (sci_rnc->destination_state == RNC_DEST_FINAL))
-                || (sci_rnc->sm.current_state_id == SCI_RNC_INITIAL);
+        return (sci_rnc->destination_state == RNC_DEST_FINAL)
+                || ((sci_rnc->sm.current_state_id == SCI_RNC_INITIAL)
+                    && (sci_rnc->destination_state == RNC_DEST_UNSPECIFIED));
 }
 #endif  /* _SCIC_SDS_REMOTE_NODE_CONTEXT_H_ */