mcp251x_read_stat_poll_timeout
ret = mcp251x_read_stat_poll_timeout(spi, value, value == CANCTRL_REQOP_CONF,
ret = mcp251x_read_stat_poll_timeout(spi, value, value == 0,
ret = mcp251x_read_stat_poll_timeout(spi, value, value == CANCTRL_REQOP_CONF,