From: "guoyin.chen" <guoyin.chen@xxxxxxxxxxxxx>
In android without shell environment (androidboot.selinux enable), do suspend/resume
test, console terminal has no message print out. The issue is reproduced at i.MX serial
platforms like i.MX6Q/DL/SX.
In common code, cons->cflag is cleared to zero in .uart_port_startup(), but
after resume back, use the cons->cflag to set termios.
......................
uart_port_startup->
uport->cons->cflag = 0;
uart_resume_port()->
termios.c_cflga = uport->cons->cflag;
...
uport->ops->set_termios(uport, &termios, NULL);
......................
If the console baud rate is 115200 bps, after Android resume back, the console
baud rate is initialized to 9600 bps. So the patch save the console cflag.
Signed-off-by: Fugang Duan <B38611@xxxxxxxxxxxxx>
---
drivers/tty/serial/serial_core.c | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 0b7bb12..4b21091 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -162,10 +162,9 @@ static int uart_port_startup(struct tty_struct *tty, struct uart_state *state,
retval = uport->ops->startup(uport);
if (retval == 0) {
- if (uart_console(uport) && uport->cons->cflag) {
+ if (uart_console(uport) && uport->cons->cflag)
tty->termios.c_cflag = uport->cons->cflag;
- uport->cons->cflag = 0;
- }
+
/*
* Initialise the hardware port settings.
*/
--
1.7.8
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