diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/mvebu-uart.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/tty/serial/mvebu-uart.c b/drivers/tty/serial/mvebu-uart.c index 6bd0c40008bb..e52248ec2689 100644 --- a/drivers/tty/serial/mvebu-uart.c +++ b/drivers/tty/serial/mvebu-uart.c @@ -165,8 +165,16 @@ static void mvebu_uart_stop_tx(struct uart_port *port) static void mvebu_uart_start_tx(struct uart_port *port) { - unsigned int ctl = readl(port->membase + UART_INTR(port)); + unsigned int ctl; + struct circ_buf *xmit = &port->state->xmit; + if (IS_EXTENDED(port) && !uart_circ_empty(xmit)) { + writel(xmit->buf[xmit->tail], port->membase + UART_TSH(port)); + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); + port->icount.tx++; + } + + ctl = readl(port->membase + UART_INTR(port)); ctl |= CTRL_TX_RDY_INT(port); writel(ctl, port->membase + UART_INTR(port)); } |