tty: serial - fix tty back references in termios

One or two drivers go poking back into the tty from the termios setting
routine in unsafe ways. We don't need to pass the tty down because the
[ab]users are just using it to get at things they can get at anyway.

This leaves low_latency setting to sort out along with set_ldisc use.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/serial/ioc4_serial.c b/drivers/serial/ioc4_serial.c
index 8ad28fc64926..fcfe82653ac8 100644
--- a/drivers/serial/ioc4_serial.c
+++ b/drivers/serial/ioc4_serial.c
@@ -1685,11 +1685,12 @@ ioc4_change_speed(struct uart_port *the_port,
 {
         struct ioc4_port *port = get_ioc4_port(the_port, 0);
         int baud, bits;
-        unsigned cflag;
+        unsigned cflag, iflag;
         int new_parity = 0, new_parity_enable = 0, new_stop = 0, new_data = 8;
         struct uart_state *state = the_port->state;
 
         cflag = new_termios->c_cflag;
+        iflag = new_termios->c_iflag;
 
         switch (cflag & CSIZE) {
         case CS5:
@@ -1741,12 +1742,12 @@ ioc4_change_speed(struct uart_port *the_port,
 
         state->port.tty->low_latency = 1;
 
-        if (I_IGNPAR(state->port.tty))
+        if (iflag & IGNPAR)
                 the_port->ignore_status_mask &= ~(N_PARITY_ERROR
                                                 | N_FRAMING_ERROR);
-        if (I_IGNBRK(state->port.tty)) {
+        if (iflag & IGNBRK) {
                 the_port->ignore_status_mask &= ~N_BREAK;
-                if (I_IGNPAR(state->port.tty))
+                if (iflag & IGNPAR)
                         the_port->ignore_status_mask &= ~N_OVERRUN_ERROR;
         }
         if (!(cflag & CREAD)) {