size_t len,
loff_t *offset )
{
- loff_t pos = *offset;
- struct proc_data *priv = (struct proc_data*)file->private_data;
+ struct proc_data *priv = file->private_data;
if (!priv->rbuffer)
return -EINVAL;
- if (pos < 0)
- return -EINVAL;
- if (pos >= priv->readlen)
- return 0;
- if (len > priv->readlen - pos)
- len = priv->readlen - pos;
- if (copy_to_user(buffer, priv->rbuffer + pos, len))
- return -EFAULT;
- *offset = pos + len;
- return len;
+ return simple_read_from_buffer(buffer, len, offset, priv->rbuffer,
+ priv->readlen);
}
/*