patch "serial: 8250_mtk: Fix uart_get_baud_rate warning" added to tty-linus

This is a note to let you know that I've just added the patch titled

serial: 8250_mtk: Fix uart_get_baud_rate warning

to my tty git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git
in the tty-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 912ab37c798770f21b182d656937072b58553378 Mon Sep 17 00:00:00 2001
From: Claire Chang <[email protected]>
Date: Mon, 2 Nov 2020 20:07:49 +0800
Subject: serial: 8250_mtk: Fix uart_get_baud_rate warning

Mediatek 8250 port supports speed higher than uartclk / 16. If the baud rates in both the new and the old termios setting are higher than uartclk / 16, the WARN_ON in uart_get_baud_rate() will be triggered. Passing NULL as the old termios so uart_get_baud_rate() will use uartclk / 16 - 1 as the new baud rate which will be replaced by the original baud rate later by tty_termios_encode_baud_rate() in mtk8250_set_termios().

---
 drivers/tty/serial/8250/8250_mtk.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 41f4120abdf2..fa876e2c13e5 100644
@@ -317,7 +317,7 @@ mtk8250_set_termios(struct uart_port *port, struct ktermios *termios,
 	 */
 	baud = tty_termios_baud_rate(termios);
 
-	serial8250_do_set_termios(port, termios, old);
+	serial8250_do_set_termios(port, termios, NULL);
 
 	tty_termios_encode_baud_rate(termios, baud, baud);
 

2.29.2