R92C_TRXDMA_CTRL
reg = rtwn_pci_read_2(sc, R92C_TRXDMA_CTRL);
rtwn_pci_write_2(sc, R92C_TRXDMA_CTRL, reg);
reg = urtwn_read_2(sc, R92C_TRXDMA_CTRL);
urtwn_write_2(sc, R92C_TRXDMA_CTRL, reg);
urtwn_write_1(sc, R92C_TRXDMA_CTRL,
urtwn_read_1(sc, R92C_TRXDMA_CTRL) | R92C_TRXDMA_CTRL_RXDMA_AGG_EN);