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-rw-r--r--drivers/tty/serial/8250/8250_dma.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/tty/serial/8250/8250_dma.c b/drivers/tty/serial/8250/8250_dma.c
index fdb6139e8c1..7046769608d 100644
--- a/drivers/tty/serial/8250/8250_dma.c
+++ b/drivers/tty/serial/8250/8250_dma.c
@@ -149,8 +149,14 @@ int serial8250_request_dma(struct uart_8250_port *p)
struct uart_8250_dma *dma = p->dma;
dma_cap_mask_t mask;
- dma->rxconf.src_addr = p->port.mapbase + UART_RX;
- dma->txconf.dst_addr = p->port.mapbase + UART_TX;
+ /* Default slave configuration parameters */
+ dma->rxconf.direction = DMA_DEV_TO_MEM;
+ dma->rxconf.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
+ dma->rxconf.src_addr = p->port.mapbase + UART_RX;
+
+ dma->txconf.direction = DMA_MEM_TO_DEV;
+ dma->txconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
+ dma->txconf.dst_addr = p->port.mapbase + UART_TX;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);