isci: save the i/o tag outside the scic request structure.

The pointer to the core representation of a request is marked NULL at
completion, but we need to save the i/o tag for task management.
Signed-off-by: NJeff Skirvin <jeffrey.d.skirvin@intel.com>
Signed-off-by: NJacek Danecki <Jacek.Danecki@intel.com>
[revise changelog]
Signed-off-by: NDan Williams <dan.j.williams@intel.com>

drivers/scsi/isci/request.c

@@ -463,6 +463,12 @@ int isci_request_execute(
 				 */
 				status = SCI_SUCCESS;
 			}
+			else
+				/* Save the tag for possible task mgmt later. */
+				request->io_tag = scic_io_request_get_io_tag(
+						     request->sci_request_handle);
+
+
 		} else
 			dev_warn(&isci_host->pdev->dev,
 				 "%s: failed request start\n",

drivers/scsi/isci/task.c

@@ -544,7 +544,7 @@ void isci_task_build_tmf(
 	void (*tmf_sent_cb)(enum isci_tmf_cb_state,
 			    struct isci_tmf *,
 			    void *),
-	void *cb_data)
+	struct isci_request *old_request)
 {
 	dev_dbg(&isci_device->isci_port->isci_host->pdev->dev,
 		"%s: isci_device = %p\n", __func__, isci_device);
@@ -555,7 +555,9 @@ void isci_task_build_tmf(
 	tmf->tmf_code      = code;
 	tmf->timeout_timer = NULL;
 	tmf->cb_state_func = tmf_sent_cb;
-	tmf->cb_data       = cb_data;
+	tmf->cb_data       = old_request;
+	tmf->io_tag        = old_request->io_tag;
+
 }
 
 static struct isci_request *isci_task_get_request_from_task(
@@ -1248,10 +1250,6 @@ int isci_task_abort_task(struct sas_task *task)
 		isci_task_build_tmf(&tmf, isci_device, isci_tmf_ssp_task_abort,
 				    isci_abort_task_process_cb, old_request);
 
-		tmf.io_tag = scic_io_request_get_io_tag(
-			old_request->sci_request_handle
-			);
-
 		spin_unlock_irqrestore(&isci_host->scic_lock, flags);
 
 		#define ISCI_ABORT_TASK_TIMEOUT_MS 500 /* half second timeout. */

drivers/scsi/isci/task.h

@@ -224,7 +224,7 @@ void isci_task_build_tmf(
 	void (*tmf_sent_cb)(
 		enum isci_tmf_cb_state,
 		struct isci_tmf *, void *),
-	void *cb_data);
+	struct isci_request *old_request);
 
 int isci_task_execute_tmf(
 	struct isci_host *isci_host,