static int ath_tx_edma_init(struct ath_softc *sc)
{
	int err;

	err = ath_txstatus_setup(sc, ATH_TXSTATUS_RING_SIZE);
	if (!err)
		ath9k_hw_setup_statusring(sc->sc_ah, sc->txsdma.dd_desc,
					  sc->txsdma.dd_desc_paddr,
					  ATH_TXSTATUS_RING_SIZE);

	return err;
}

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.