xsvf: add missing error propagation

Change-Id: Ibc70deb980d6d18ceb376b72d9104e6180b16acf
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
Reviewed-on: http://openocd.zylin.com/176
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

src/xsvf/xsvf.c

@@ -510,14 +510,19 @@ COMMAND_HANDLER(handle_xsvf_command)
 				if (xruntest)
 				{
 					result = svf_add_statemove(TAP_IDLE);
+					if (result != ERROR_OK)
+						return result;
 
 					if (runtest_requires_tck)
 						jtag_add_clocks(xruntest);
 					else
 						jtag_add_sleep(xruntest);
-				}
-				else if (xendir != TAP_DRPAUSE)	/* we are already in TAP_DRPAUSE */
+				} else if (xendir != TAP_DRPAUSE) {
+					/* we are already in TAP_DRPAUSE */
 					result = svf_add_statemove(xenddr);
+					if (result != ERROR_OK)
+						return result;
+				}
 			}
 			break;
 
@@ -790,8 +795,12 @@ COMMAND_HANDLER(handle_xsvf_command)
 				{
 					/* FIXME handle statemove errors ... */
 					result = svf_add_statemove(wait_state);
+					if (result != ERROR_OK)
+						return result;
 					jtag_add_sleep(delay);
 					result = svf_add_statemove(end_state);
+					if (result != ERROR_OK)
+						return result;
 				}
 			}
 			break;
@@ -846,12 +855,16 @@ COMMAND_HANDLER(handle_xsvf_command)
 
 				/* FIXME handle statemove errors ... */
 				result = svf_add_statemove(wait_state);
+				if (result != ERROR_OK)
+					return result;
 
 				jtag_add_clocks(clock_count);
 
 				jtag_add_sleep(usecs);
 
 				result = svf_add_statemove(end_state);
+				if (result != ERROR_OK)
+					return result;
 			}
 			break;
 
@@ -925,6 +938,8 @@ COMMAND_HANDLER(handle_xsvf_command)
 					struct scan_field field;
 
 					result = svf_add_statemove(loop_state);
+					if (result != ERROR_OK)
+						return result;
 					jtag_add_clocks(loop_clocks);
 					jtag_add_sleep(loop_usecs);
 
@@ -1003,7 +1018,11 @@ COMMAND_HANDLER(handle_xsvf_command)
 
 			/* upon error, return the TAPs to a reasonable state */
 			result = svf_add_statemove(TAP_IDLE);
+			if (result != ERROR_OK)
+				return result;
 			result = jtag_execute_queue();
+			if (result != ERROR_OK)
+				return result;
 			break;
 		}
 	}