isci: don't hold scic_lock over calls to sas_task_abort()

In the case where submitted I/Os fail with the status code
SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED, the execute function now waits
until scic_lock is cleared before calling the helper function
"isci_request_signal_device_reset" which sets the flag for the pending
reset condition on the I/O.
Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

drivers/scsi/isci/request.c

@@ -449,6 +449,18 @@ int isci_request_execute(
 			list_add(&request->dev_node,
 				 &isci_device->reqs_in_process);
 
+			if (status == SCI_SUCCESS) {
+				/* 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",
+				 __func__);
+
+		spin_unlock_irqrestore(&isci_host->scic_lock, flags);
+
 		if (status ==
 		    SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED) {
 			/* Signal libsas that we need the SCSI error
@@ -463,18 +475,6 @@ 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",
-				 __func__);
-
-		spin_unlock_irqrestore(&isci_host->scic_lock, flags);
 
 	} else
 		dev_warn(&isci_host->pdev->dev,