cdrom: fail pausing on seek

libretro/pcsx_rearmed#790

diff --git a/libpcsxcore/cdrom.c b/libpcsxcore/cdrom.c
index 6d8e631..3991bad 100644 (file)
--- a/libpcsxcore/cdrom.c
+++ b/libpcsxcore/cdrom.c
@@ -715,6 +715,7 @@ void cdrInterrupt(void) {
        int read_ok;
        u16 not_ready = 0;
        u8 IrqStat = Acknowledge;
+       u8 DriveStateOld;
        u16 Cmd;
        int i;
 
@@ -964,7 +965,16 @@ void cdrInterrupt(void) {
                                second_resp_time = (((cdr.Mode & MODE_SPEED) ? 1 : 2) * 1097107);
                        }
                        SetPlaySeekRead(cdr.StatP, 0);
+                       DriveStateOld = cdr.DriveState;
                        cdr.DriveState = DRIVESTATE_PAUSED;
+                       if (DriveStateOld == DRIVESTATE_SEEK) {
+                               // According to Duckstation this fails, but the
+                               // exact conditions and effects are not clear.
+                               // Moto Racer World Tour seems to rely on this.
+                               // For now assume pause works anyway, just errors out.
+                               error = ERROR_NOTREADY;
+                               goto set_error;
+                       }
                        break;
 
                case CdlPause + CMD_PART2: