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, 4 insertions, 5 deletions

diff --git a/arch/xtensa/platforms/iss/console.c b/arch/xtensa/platforms/iss/console.c
index 62447d63890c..da9866f7fecf 100644
--- a/arch/xtensa/platforms/iss/console.c
+++ b/arch/xtensa/platforms/iss/console.c
@@ -58,7 +58,8 @@ static int rs_open(struct tty_struct *tty, struct file * filp)
         tty->port = &serial_port;
         spin_lock(&timer_lock);
         if (tty->count == 1) {
-                setup_timer(&serial_timer, rs_poll, (unsigned long)tty);
+                setup_timer(&serial_timer, rs_poll,
+                                (unsigned long)&serial_port);
                 mod_timer(&serial_timer, jiffies + SERIAL_TIMER_VALUE);
         }
         spin_unlock(&timer_lock);
@@ -97,9 +98,7 @@ static int rs_write(struct tty_struct * tty,
 
 static void rs_poll(unsigned long priv)
 {
-        struct tty_struct* tty = (struct tty_struct*) priv;
-        struct tty_port *port = tty->port;
-
+        struct tty_port *port = (struct tty_port *)priv;
         struct timeval tv = { .tv_sec = 0, .tv_usec = 0 };
         int i = 0;
         unsigned char c;
@@ -113,7 +112,7 @@ static void rs_poll(unsigned long priv)
         }
 
         if (i)
-                tty_flip_buffer_push(tty);
+                tty_flip_buffer_push(port);
 
 
         mod_timer(&serial_timer, jiffies + SERIAL_TIMER_VALUE);