p9_client_cb
void p9_client_cb(struct p9_client *c, struct p9_req_t *req, int status);
EXPORT_SYMBOL(p9_client_cb);
p9_client_cb(m->client, req, REQ_STATUS_ERROR);
p9_client_cb(m->client, m->rreq, REQ_STATUS_RCVD);
p9_client_cb(client, req, REQ_STATUS_RCVD);
p9_client_cb(usb9pfs->client, p9_rx_req, status);
p9_client_cb(usb9pfs->client, req, REQ_STATUS_ERROR);
p9_client_cb(chan->client, req, REQ_STATUS_RCVD);
p9_client_cb(priv->client, req, status);