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serial: tegra-tcu: Use uart_xmit_advance(), fixes icount.tx accounting

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commit 1d10cd4da593bc0196a239dcc54dac24b6b0a74e upstream.

Tx'ing does not correctly account Tx'ed characters into icount.tx.
Using uart_xmit_advance() fixes the problem.

Fixes: 2d908b38d4 ("serial: Add Tegra Combined UART driver")
Cc: <stable@vger.kernel.org> # serial: Create uart_xmit_advance()
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220901143934.8850-4-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ilpo Järvinen 2022-09-01 17:39:34 +03:00 committed by Greg Kroah-Hartman
parent 6cc0434f9d
commit 9eb710d184
1 changed files with 1 additions and 1 deletions
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drivers/tty/serial/tegra-tcu.c
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@ -101,7 +101,7 @@ static void tegra_tcu_uart_start_tx(struct uart_port *port)
break; break;
tegra_tcu_write(tcu, &xmit->buf[xmit->tail], count); 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); uart_write_wakeup(port);