hvc_console: Add tty driver flag TTY_DRIVER_RESET_TERMIOS

After a tty hangup() or close() operation, processes might not reset the
termio settings to a sane state. In order to reset the termios to its
default settings the tty driver flag TTY_DRIVER_RESET_TERMIOS has been added.

TTY driver flag description from include/linux/tty_driver.h:
	TTY_DRIVER_RESET_TERMIOS --- requests the tty layer to reset the
	  termios setting when the last process has closed the device.
	  Used for PTY's, in particular.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/drivers/char/hvc_console.c b/drivers/char/hvc_console.c
index 5c9750e..c9d1666 100644 (file)
--- a/drivers/char/hvc_console.c
+++ b/drivers/char/hvc_console.c
@@ -796,7 +796,7 @@ static int hvc_init(void)
        drv->minor_start = HVC_MINOR;
        drv->type = TTY_DRIVER_TYPE_SYSTEM;
        drv->init_termios = tty_std_termios;
-       drv->flags = TTY_DRIVER_REAL_RAW;
+       drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS;
        tty_set_operations(drv, &hvc_ops);
 
        /* Always start the kthread because there can be hotplug vty adapters