
#define CHECK_NULL(ptr) if (!ptr) return -EINVAL

int spi_sync(struct spi_device *spi, struct spi_message *message)
{
    int ret;
    
    CHECK_NULL(spi);
    CHECK_NULL(spi->controller);
    
    mutex_lock(&spi->controller->bus_lock_mutex);
    ret = __spi_sync(spi, message);
    mutex_unlock(&spi->controller->bus_lock_mutex);
    
    return ret;
}
