TTY: switch tty_flip_buffer_push

Now, we start converting tty buffer functions to actually use
tty_port. This will allow us to get rid of the need of tty in many
call sites. Only tty_port will needed and hence no more
tty_port_tty_get in those paths.

Now, the one where most of tty_port_tty_get gets removed:
tty_flip_buffer_push.

IOW we also closed all the races in drivers not using tty_port_tty_get
at all yet.

Also we move tty_flip_buffer_push declaration from include/linux/tty.h
to include/linux/tty_flip.h to all others while we are changing it
anyway.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 3 insertions, 4 deletions

diff --git a/arch/mn10300/kernel/mn10300-serial.c b/arch/mn10300/kernel/mn10300-serial.c
index ae61bd692b4b..1dd20dbfd098 100644
--- a/arch/mn10300/kernel/mn10300-serial.c
+++ b/arch/mn10300/kernel/mn10300-serial.c
@@ -525,7 +525,6 @@ static void mn10300_serial_receive_interrupt(struct mn10300_serial_port *port)
 {
         struct uart_icount *icount = &port->uart.icount;
         struct tty_port *port = &port->uart.state->port;
-        struct tty_struct *tty = port->tty;
         unsigned ix;
         int count;
         u8 st, ch, push, status, overrun;
@@ -538,7 +537,7 @@ static void mn10300_serial_receive_interrupt(struct mn10300_serial_port *port)
         count = tty_buffer_request_room(port, count);
         if (count == 0) {
                 if (!port->low_latency)
-                        tty_flip_buffer_push(tty);
+                        tty_flip_buffer_push(port);
                 return;
         }
 
@@ -547,7 +546,7 @@ try_again:
         ix = ACCESS_ONCE(port->rx_outp);
         if (CIRC_CNT(port->rx_inp, ix, MNSC_BUFFER_SIZE) == 0) {
                 if (push && !port->low_latency)
-                        tty_flip_buffer_push(tty);
+                        tty_flip_buffer_push(port);
                 return;
         }
 
@@ -679,7 +678,7 @@ insert:
         count--;
         if (count <= 0) {
                 if (!port->low_latency)
-                        tty_flip_buffer_push(tty);
+                        tty_flip_buffer_push(port);
                 return;
         }