staging: unisys: visorbus: add error handling to chipset_device_pause/resume

If there is an error in chipset_device_pause/resume don't try to respond,
error out and let the calling functions respond to this error just like
any other error they encounter.
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/visorbus/visorbus_main.c

@@ -1241,7 +1241,7 @@ initiate_chipset_device_pause_resume(struct visor_device *dev, bool is_pause)
  * that device.  Success/failure result is returned asynchronously
  * via a callback function; see pause_state_change_complete().
  */
-void
+int
 chipset_device_pause(struct visor_device *dev_info)
 {
 	int err;
@@ -1250,8 +1250,10 @@ chipset_device_pause(struct visor_device *dev_info)
 
 	if (err < 0) {
 		dev_info->pausing = false;
-		device_pause_response(dev_info, err);
+		return err;
 	}
+
+	return 0;
 }
 
 /**
@@ -1262,7 +1264,7 @@ chipset_device_pause(struct visor_device *dev_info)
  * that device.  Success/failure result is returned asynchronously
  * via a callback function; see resume_state_change_complete().
  */
-void
+int
 chipset_device_resume(struct visor_device *dev_info)
 {
 	int err;
@@ -1270,9 +1272,11 @@ chipset_device_resume(struct visor_device *dev_info)
 	err = initiate_chipset_device_pause_resume(dev_info, false);
 
 	if (err < 0) {
-		device_resume_response(dev_info, err);
 		dev_info->resuming = false;
+		return err;
 	}
+
+	return 0;
 }
 
 int

drivers/staging/unisys/visorbus/visorbus_private.h

@@ -31,8 +31,8 @@ int chipset_bus_create(struct visor_device *bus_info);
 void chipset_bus_destroy(struct visor_device *bus_info);
 int chipset_device_create(struct visor_device *dev_info);
 void chipset_device_destroy(struct visor_device *dev_info);
-void chipset_device_pause(struct visor_device *dev_info);
-void chipset_device_resume(struct visor_device *dev_info);
+int chipset_device_pause(struct visor_device *dev_info);
+int chipset_device_resume(struct visor_device *dev_info);
 
 void bus_create_response(struct visor_device *p, int response);
 void bus_destroy_response(struct visor_device *p, int response);

drivers/staging/unisys/visorbus/visorchipset.c

@@ -883,7 +883,7 @@ my_device_changestate(struct controlvm_message *inmsg)
 	u32 dev_no = cmd->device_change_state.dev_no;
 	struct spar_segment_state state = cmd->device_change_state.state;
 	struct visor_device *dev_info;
-	int err;
+	int err = 0;
 
 	dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL);
 	if (!dev_info) {
@@ -918,7 +918,7 @@ my_device_changestate(struct controlvm_message *inmsg)
 	if (state.alive == segment_state_running.alive &&
 	    state.operating == segment_state_running.operating)
 		/* Response will be sent from chipset_device_resume */
-		chipset_device_resume(dev_info);
+		err = chipset_device_resume(dev_info);
 	/* ServerNotReady / ServerLost / SegmentStateStandby */
 	else if (state.alive == segment_state_standby.alive &&
 		 state.operating == segment_state_standby.operating)
@@ -926,7 +926,10 @@ my_device_changestate(struct controlvm_message *inmsg)
 		 * technically this is standby case where server is lost.
 		 * Response will be sent from chipset_device_pause.
 		 */
-		chipset_device_pause(dev_info);
+		err = chipset_device_pause(dev_info);
+	if (err)
+		goto err_respond;
+
 	return 0;
 
 err_respond: