diff options
Diffstat (limited to 'drivers/tty/serial/8250/8250_lpss.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_lpss.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/tty/serial/8250/8250_lpss.c b/drivers/tty/serial/8250/8250_lpss.c index 98dbc7963..448388ec0 100644 --- a/drivers/tty/serial/8250/8250_lpss.c +++ b/drivers/tty/serial/8250/8250_lpss.c @@ -246,8 +246,13 @@ static int lpss8250_dma_setup(struct lpss8250 *lpss, struct uart_8250_port *port struct dw_dma_slave *rx_param, *tx_param; struct device *dev = port->port.dev; - if (!lpss->dma_param.dma_dev) + if (!lpss->dma_param.dma_dev) { + dma = port->dma; + if (dma) + goto out_configuration_only; + return 0; + } rx_param = devm_kzalloc(dev, sizeof(*rx_param), GFP_KERNEL); if (!rx_param) @@ -258,16 +263,18 @@ static int lpss8250_dma_setup(struct lpss8250 *lpss, struct uart_8250_port *port return -ENOMEM; *rx_param = lpss->dma_param; - dma->rxconf.src_maxburst = lpss->dma_maxburst; - *tx_param = lpss->dma_param; - dma->txconf.dst_maxburst = lpss->dma_maxburst; dma->fn = lpss8250_dma_filter; dma->rx_param = rx_param; dma->tx_param = tx_param; port->dma = dma; + +out_configuration_only: + dma->rxconf.src_maxburst = lpss->dma_maxburst; + dma->txconf.dst_maxburst = lpss->dma_maxburst; + return 0; } |