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, 2 insertions, 3 deletions

diff --git a/drivers/tty/serial/mpsc.c b/drivers/tty/serial/mpsc.c
index 6f2d2ceb326a..bc24f4931670 100644
--- a/drivers/tty/serial/mpsc.c
+++ b/drivers/tty/serial/mpsc.c
@@ -938,7 +938,6 @@ static int mpsc_rx_intr(struct mpsc_port_info *pi)
 {
         struct mpsc_rx_desc *rxre;
         struct tty_port *port = &pi->port.state->port;
-        struct tty_struct *tty = port->tty;
         u32     cmdstat, bytes_in, i;
         int     rc = 0;
         u8      *bp;
@@ -971,7 +970,7 @@ static int mpsc_rx_intr(struct mpsc_port_info *pi)
                 /* Following use of tty struct directly is deprecated */
                 if (tty_buffer_request_room(port, bytes_in) < bytes_in) {
                         if (port->low_latency)
-                                tty_flip_buffer_push(tty);
+                                tty_flip_buffer_push(port);
                         /*
                          * If this failed then we will throw away the bytes
                          * but must do so to clear interrupts.
@@ -1081,7 +1080,7 @@ next_frame:
         if ((readl(pi->sdma_base + SDMA_SDCM) & SDMA_SDCM_ERD) == 0)
                 mpsc_start_rx(pi);
 
-        tty_flip_buffer_push(tty);
+        tty_flip_buffer_push(port);
         return rc;
 }