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/clps711x.c b/drivers/tty/serial/clps711x.c
index 3fd2526..bfb1796 100644
--- a/drivers/tty/serial/clps711x.c
+++ b/drivers/tty/serial/clps711x.c
@@ -85,12 +85,8 @@
static irqreturn_t uart_clps711x_int_rx(int irq, void *dev_id)
{
struct uart_port *port = dev_id;
- struct tty_struct *tty = tty_port_tty_get(&port->state->port);
unsigned int status, ch, flg;
- if (!tty)
- return IRQ_HANDLED;
-
for (;;) {
status = clps_readl(SYSFLG(port));
if (status & SYSFLG_URXFE)
@@ -130,9 +126,7 @@
uart_insert_char(port, status, UARTDR_OVERR, ch, flg);
}
- tty_flip_buffer_push(tty);
-
- tty_kref_put(tty);
+ tty_flip_buffer_push(&port->state->port);
return IRQ_HANDLED;
}