From: Dirk Behme <dirk.behme@xxxxxxxxxxxx> Use imx_start_tx() just to enable the TX interrupt. It's the job of the TX interrupt ISR to fill the transmit buffer, then. If the transmit buffer is empty, the TX interrupt should be executed as soon as the start_tx() enables the interrupt, so there is no reason for the extra imx_transmit_buffer() call, here. Remove it. Signed-off-by: Dirk Behme <dirk.behme@xxxxxxxxxxxx> Signed-off-by: Andy Lowe <andy_lowe@xxxxxxxxxx> --- drivers/tty/serial/imx.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 3b6c1a2..7b813b3 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -600,9 +600,6 @@ static void imx_start_tx(struct uart_port *port) imx_dma_tx(sport); return; } - - if (readl(sport->port.membase + uts_reg(sport)) & UTS_TXEMPTY) - imx_transmit_buffer(sport); } static irqreturn_t imx_rtsint(int irq, void *dev_id) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
