diff options
Diffstat (limited to 'drivers/tty/serial/8250/8250_dma.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_dma.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/tty/serial/8250/8250_dma.c b/drivers/tty/serial/8250/8250_dma.c index b3c3f7e5851a..7133fceed35e 100644 --- a/drivers/tty/serial/8250/8250_dma.c +++ b/drivers/tty/serial/8250/8250_dma.c @@ -34,7 +34,7 @@ static void __dma_tx_complete(void *param) uart_write_wakeup(&p->port); ret = serial8250_tx_dma(p); - if (ret) + if (ret || !dma->tx_running) serial8250_set_THRI(p); spin_unlock_irqrestore(&p->port.lock, flags); @@ -80,12 +80,13 @@ int serial8250_tx_dma(struct uart_8250_port *p) if (uart_tx_stopped(&p->port) || uart_circ_empty(xmit)) { /* We have been called from __dma_tx_complete() */ - serial8250_rpm_put_tx(p); return 0; } dma->tx_size = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE); + serial8250_do_prepare_tx_dma(p); + desc = dmaengine_prep_slave_single(dma->txchan, dma->tx_addr + xmit->tail, dma->tx_size, DMA_MEM_TO_DEV, @@ -123,6 +124,8 @@ int serial8250_rx_dma(struct uart_8250_port *p) if (dma->rx_running) return 0; + serial8250_do_prepare_rx_dma(p); + desc = dmaengine_prep_slave_single(dma->rxchan, dma->rx_addr, dma->rx_size, DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); |