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tty: serial: meson: The system stuck when you run the stty command on the console to change the baud rate

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Start the console and run the following commands in turn:
stty -F /dev/ttyAML0 115200 and stty -F /dev/ttyAML0 921600. The
system will stuck.

Signed-off-by: Yu Tu <yu.tu@amlogic.com>
Link: https://lore.kernel.org/r/20220225073922.3947-6-yu.tu@amlogic.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yu Tu 2022-02-25 15:39:21 +08:00 committed by Greg Kroah-Hartman
parent e5fc2b9984
commit 19b2ba0baf
1 changed files with 5 additions and 0 deletions
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5
drivers/tty/serial/meson_uart.c
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@ -365,8 +365,13 @@ static void meson_uart_set_termios(struct uart_port *port,
writel(val, port->membase + AML_UART_CONTROL);
baud = uart_get_baud_rate(port, termios, old, 50, 4000000);
spin_unlock_irqrestore(&port->lock, flags);
meson_uart_change_speed(port, baud);
spin_lock_irqsave(&port->lock, flags);
port->read_status_mask = AML_UART_TX_FIFO_WERR;
if (iflags & INPCK)
port->read_status_mask |= AML_UART_PARITY_ERR |