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>
diff --git a/drivers/tty/serial/mrst_max3110.c b/drivers/tty/serial/mrst_max3110.c
index 4632db7..f641c23 100644
--- a/drivers/tty/serial/mrst_max3110.c
+++ b/drivers/tty/serial/mrst_max3110.c
@@ -340,7 +340,6 @@
{
struct uart_port *port = &max->port;
struct tty_port *tport;
- struct tty_struct *tty;
char buf[M3110_RX_FIFO_DEPTH];
int r, w, usable;
@@ -349,9 +348,6 @@
return 0;
tport = &port->state->port;
- tty = tty_port_tty_get(tport);
- if (!tty)
- return 0;
for (r = 0, w = 0; r < len; r++) {
if (str[r] & MAX3110_BREAK &&
@@ -366,10 +362,8 @@
}
}
- if (!w) {
- tty_kref_put(tty);
+ if (!w)
return 0;
- }
for (r = 0; w; r += usable, w -= usable) {
usable = tty_buffer_request_room(tport, w);
@@ -378,8 +372,7 @@
port->icount.rx += usable;
}
}
- tty_flip_buffer_push(tty);
- tty_kref_put(tty);
+ tty_flip_buffer_push(tport);
return r;
}