diff --git a/drivers/usb/gadget/m66592-udc.c b/drivers/usb/gadget/m66592-udc.c
index 51b19f3027e7bb94b37a2771b36f646837479ae5..084aa080a2d520a8bab933f098ab5f9048f45283 100644
--- a/drivers/usb/gadget/m66592-udc.c
+++ b/drivers/usb/gadget/m66592-udc.c
@@ -258,7 +258,7 @@ static int pipe_buffer_setting(struct m66592 *m66592,
 		break;
 	case M66592_BULK:
 		/* isochronous pipes may be used as bulk pipes */
-		if (info->pipe > M66592_BASE_PIPENUM_BULK)
+		if (info->pipe >= M66592_BASE_PIPENUM_BULK)
 			bufnum = info->pipe - M66592_BASE_PIPENUM_BULK;
 		else
 			bufnum = info->pipe - M66592_BASE_PIPENUM_ISOC;