196 			if (mdl->readpos != mdl->bytesused)  in cx18_get_mdl()
252 	buf->readpos = 0;  in cx18_setup_sliced_vbi_mdl()
256 	mdl->readpos = 0;  in cx18_setup_sliced_vbi_mdl()
263 	size_t len = buf->bytesused - buf->readpos;  in cx18_copy_buf_to_user()
289 		const char *start = buf->buf + buf->readpos;  in cx18_copy_buf_to_user()
351 	if (copy_to_user(ubuf, (u8 *)buf->buf + buf->readpos, len)) {  in cx18_copy_buf_to_user()
356 	buf->readpos += len;  in cx18_copy_buf_to_user()
380 		mdl->readpos = mdl->bytesused;  in cx18_copy_mdl_to_user()
386 		if (mdl->curr_buf->readpos >= mdl->curr_buf->bytesused)  in cx18_copy_mdl_to_user()
393 		mdl->readpos += rc;  in cx18_copy_mdl_to_user()
398 		    mdl->curr_buf->readpos < mdl->curr_buf->bytesused ||  in cx18_copy_mdl_to_user()
399 		    mdl->readpos >= mdl->bytesused) /* MDL buffers drained */  in cx18_copy_mdl_to_user()
449 			if (mdl->readpos == mdl->bytesused)  in cx18_read()
453 		} else if (mdl->readpos == mdl->bytesused) {  in cx18_read()