Function rpmsgdev_read_handler

drivers/misc/rpmsgdev.c:911–935

 ****************************************************************************/

static int rpmsgdev_read_handler(FAR struct rpmsg_endpoint *ept,
                                 FAR void *data, size_t len,
                                 uint32_t src, FAR void *priv)
{
  FAR struct rpmsgdev_header_s *header = data;
  FAR struct rpmsgdev_cookie_s *cookie =
      (FAR struct rpmsgdev_cookie_s *)(uintptr_t)header->cookie;
  FAR struct rpmsgdev_read_s *rsp = data;
  FAR struct iovec *read = cookie->data;

  cookie->result = header->result;
  if (cookie->result > 0)
    {
      memcpy(read->iov_base + read->iov_len, rsp->buf, cookie->result);
      read->iov_len += cookie->result;
    }

  if (header->command == RPMSGDEV_READ_NOFRAG ||
      cookie->result <= 0 || read->iov_len >= rsp->count)
    {
      rpmsg_post(ept, &cookie->sem);
    }

  return 0;
}

/****************************************************************************
 * Name: rpmsgdev_ioctl_handler