diff options
Diffstat (limited to 'drivers/tty/serial/imx.c')
| -rw-r--r-- | drivers/tty/serial/imx.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 708ba899258d..c6c3b160dac7 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -795,8 +795,15 @@ static irqreturn_t imx_int(int irq, void *dev_id) static unsigned int imx_tx_empty(struct uart_port *port) { struct imx_port *sport = (struct imx_port *)port; + unsigned int ret; - return (readl(sport->port.membase + USR2) & USR2_TXDC) ? TIOCSER_TEMT : 0; + ret = (readl(sport->port.membase + USR2) & USR2_TXDC) ? TIOCSER_TEMT : 0; + + /* If the TX DMA is working, return 0. */ + if (sport->dma_is_enabled && sport->dma_is_txing) + ret = 0; + + return ret; } /* |