Tx'ing does not correctly account Tx'ed characters into icount.tx.
Using uart_xmit_advance() fixes the problem.
Cc: <stable@xxxxxxxxxxxxxxx> # serial: Create uart_xmit_advance()
Fixes: 2d908b38d409 ("serial: Add Tegra Combined UART driver")
Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
---
drivers/tty/serial/tegra-tcu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/serial/tegra-tcu.c b/drivers/tty/serial/tegra-tcu.c
index 4877c54c613d..889b701ba7c6 100644
--- a/drivers/tty/serial/tegra-tcu.c
+++ b/drivers/tty/serial/tegra-tcu.c
@@ -101,7 +101,7 @@ static void tegra_tcu_uart_start_tx(struct uart_port *port)
break;
tegra_tcu_write(tcu, &xmit->buf[xmit->tail], count);
- xmit->tail = (xmit->tail + count) & (UART_XMIT_SIZE - 1);
+ uart_xmit_advance(port, count);
}
uart_write_wakeup(port);
--
2.30.2
