[drivers][serial]fix error in getting serial_tty settings (#8953)

zmshahaha · web-flow · commit ed002bb84afd · 2024-05-16T15:36:16.000+08:00
fix error in getting serial_tty settings
diff --git a/components/drivers/serial/serial_tty.c b/components/drivers/serial/serial_tty.c
@@ -179,11 +179,13 @@ static void _serial_tty_set_speed(struct lwp_tty *tp)
 {
     struct serial_tty_context *softc = (struct serial_tty_context *)(tp->t_devswsoftc);
     struct rt_serial_device *serial;
+    struct termios serial_hw_config;
 
     RT_ASSERT(softc);
     serial = softc->parent;
 
-    rt_device_control(&(serial->parent), TCGETS, &tp->t_termios_init_in);
+    rt_device_control(&(serial->parent), TCGETS, &serial_hw_config);
+    tp->t_termios_init_in.c_cflag |= serial_hw_config.c_cflag;
 
     tp->t_termios_init_in.__c_ispeed = tp->t_termios_init_in.__c_ospeed = cfgetospeed(&tp->t_termios_init_in);
 }

Original file line number	Diff line number	Diff line change
`@@ -179,11 +179,13 @@ static void _serial_tty_set_speed(struct lwp_tty *tp)`
`179`	`179`	`{`
`180`	`180`	`struct serial_tty_context softc = (struct serial_tty_context )(tp->t_devswsoftc);`
`181`	`181`	`struct rt_serial_device *serial;`
	`182`	`+ struct termios serial_hw_config;`
`182`	`183`
`183`	`184`	`RT_ASSERT(softc);`
`184`	`185`	`serial = softc->parent;`
`185`	`186`
`186`		`- rt_device_control(&(serial->parent), TCGETS, &tp->t_termios_init_in);`
	`187`	`+ rt_device_control(&(serial->parent), TCGETS, &serial_hw_config);`
	`188`	`+ tp->t_termios_init_in.c_cflag \|= serial_hw_config.c_cflag;`
`187`	`189`
`188`	`190`	`tp->t_termios_init_in.__c_ispeed = tp->t_termios_init_in.__c_ospeed = cfgetospeed(&tp->t_termios_init_in);`
`189`	`191`	`}`