jtag: only change state if necessary

[openocd.git] / src / jtag / drivers / buspirate.c

diff --git a/src/jtag/drivers/buspirate.c b/src/jtag/drivers/buspirate.c
index 86b98823567c3dbbfbeb284accccf0c7b7c03ea8..10b5e0fde6d19c8c0ef22abf8504755728aa34d9 100644 (file)
--- a/src/jtag/drivers/buspirate.c
+++ b/src/jtag/drivers/buspirate.c
@@ -520,7 +520,10 @@ static void buspirate_scan(bool ir_scan, enum scan_type type,
        saved_end_state = tap_get_end_state();
 
        buspirate_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
-       buspirate_state_move();
+
+       /* Only move if we're not already there */
+       if (tap_get_state() != tap_get_end_state())
+               buspirate_state_move();
 
        buspirate_tap_append_scan(scan_size, buffer, command);