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tty: serial: meson: The system stuck when you run the stty command on the console...
author
Yu Tu
<yu.tu@amlogic.com>
Fri, 25 Feb 2022 07:39:21 +0000
(15:39 +0800)
committer
Greg Kroah-Hartman
<gregkh@linuxfoundation.org>
Sat, 26 Feb 2022 09:03:21 +0000
(10:03 +0100)
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>
drivers/tty/serial/meson_uart.c
patch
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blob
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diff --git
a/drivers/tty/serial/meson_uart.c
b/drivers/tty/serial/meson_uart.c
index
ba8dc20
..
d19349e
100644
(file)
--- a/
drivers/tty/serial/meson_uart.c
+++ b/
drivers/tty/serial/meson_uart.c
@@
-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 |