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path: root/drivers/tty/serial/8250/8250_dma.c
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Diffstat (limited to 'drivers/tty/serial/8250/8250_dma.c')
-rw-r--r--drivers/tty/serial/8250/8250_dma.c6
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 fcd7ac6af2f..21d01a49140 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: