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, 1 insertions, 7 deletions

diff --git a/arch/parisc/kernel/pdc_cons.c b/arch/parisc/kernel/pdc_cons.c
index 4d92a379eb21..d5cae55195ec 100644
--- a/arch/parisc/kernel/pdc_cons.c
+++ b/arch/parisc/kernel/pdc_cons.c
@@ -138,10 +138,6 @@ static const struct tty_operations pdc_console_tty_ops = {
 static void pdc_console_poll(unsigned long unused)
 {
         int data, count = 0;
-        struct tty_struct *tty = tty_port_tty_get(&tty_port);
-
-        if (!tty)
-                return;
 
         while (1) {
                 data = pdc_console_poll_key(NULL);
@@ -152,9 +148,7 @@ static void pdc_console_poll(unsigned long unused)
         }
 
         if (count)
-                tty_flip_buffer_push(tty);
-
-        tty_kref_put(tty);
+                tty_flip_buffer_push(&tty_port);
 
         if (pdc_cons.flags & CON_ENABLED)
                 mod_timer(&pdc_console_timer, jiffies + PDC_CONS_POLL_DELAY);