linux-imx

    fme_hdr = dfl_get_feature_ioaddr_by_id(&pdev->dev,

                           FME_FEATURE_ID_HEADER);

​

    /* check port id */

    v = readq(fme_hdr + FME_HDR_CAP);

    if (port_pr.port_id >= FIELD_GET(FME_CAP_NUM_PORTS, v)) {

        dev_dbg(&pdev->dev, "port number more than maximum\n");

        return -EINVAL;

    }

​

               port_pr.buffer_size))

        return -EFAULT;

​

    buf = vmalloc(port_pr.buffer_size);

    if (!buf)

        return -ENOMEM;

​

    if (copy_from_user(buf,

               (void __user *)(unsigned long)port_pr.buffer_address,

               port_pr.buffer_size)) {