TTY: add tty_port_tty_wakeup helper

It allows for cleaning up on a considerable amount of places. They did
port_get, wakeup, kref_put. Now the only thing needed is to call
tty_port_tty_wakeup which does exactly that.

One exception is ifx6x60 where tty_wakeup was open-coded. We now call
tty_wakeup properly there.

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/um/drivers/line.c b/arch/um/drivers/line.c
index f1b38571f94e..cc206eda245c 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -248,7 +248,6 @@ static irqreturn_t line_write_interrupt(int irq, void *data)
 {
         struct chan *chan = data;
         struct line *line = chan->line;
-        struct tty_struct *tty;
         int err;
 
         /*
@@ -267,12 +266,7 @@ static irqreturn_t line_write_interrupt(int irq, void *data)
         }
         spin_unlock(&line->lock);
 
-        tty = tty_port_tty_get(&line->port);
-        if (tty == NULL)
-                return IRQ_NONE;
-
-        tty_wakeup(tty);
-        tty_kref_put(tty);
+        tty_port_tty_wakeup(&line->port);
 
         return IRQ_HANDLED;
 }