diff options
Diffstat (limited to 'drivers/tty/serial/8250/8250_dma.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_dma.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/tty/serial/8250/8250_dma.c b/drivers/tty/serial/8250/8250_dma.c index fcd7ac6af2fc..21d01a491405 100644 --- a/drivers/tty/serial/8250/8250_dma.c +++ b/drivers/tty/serial/8250/8250_dma.c @@ -59,7 +59,6 @@ static void __dma_rx_complete(void *param) dma->rx_running = 0; dmaengine_tx_status(dma->rxchan, dma->rx_cookie, &state); - dmaengine_terminate_all(dma->rxchan); count = dma->rx_size - state.residue; @@ -81,6 +80,10 @@ int serial8250_tx_dma(struct uart_8250_port *p) return 0; dma->tx_size = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE); + if (dma->tx_size < p->port.fifosize) { + ret = -EINVAL; + goto err; + } desc = dmaengine_prep_slave_single(dma->txchan, dma->tx_addr + xmit->tail, @@ -131,6 +134,7 @@ int serial8250_rx_dma(struct uart_8250_port *p, unsigned int iir) if (dma->rx_running) { dmaengine_pause(dma->rxchan); __dma_rx_complete(p); + dmaengine_terminate_all(dma->rxchan); } return -ETIMEDOUT; default: |