TTY: switch tty_insert_flip_char
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.
tty_insert_flip_char is the next one to proceed. This one is used all
over the code, so the patch is huge.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c
index 333c8d0..73a3f29 100644
--- a/drivers/tty/serial/pmac_zilog.c
+++ b/drivers/tty/serial/pmac_zilog.c
@@ -229,6 +229,7 @@
static struct tty_struct *pmz_receive_chars(struct uart_pmac_port *uap)
{
+ struct tty_port *port;
struct tty_struct *tty = NULL;
unsigned char ch, r1, drop, error, flag;
int loops = 0;
@@ -239,7 +240,8 @@
(void)read_zsdata(uap);
return NULL;
}
- tty = uap->port.state->port.tty;
+ port = &uap->port.state->port;
+ tty = port->tty; /* TOCTOU above */
while (1) {
error = 0;
@@ -309,10 +311,10 @@
if (uap->port.ignore_status_mask == 0xff ||
(r1 & uap->port.ignore_status_mask) == 0) {
- tty_insert_flip_char(tty, ch, flag);
+ tty_insert_flip_char(port, ch, flag);
}
if (r1 & Rx_OVR)
- tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+ tty_insert_flip_char(port, 0, TTY_OVERRUN);
next_char:
/* We can get stuck in an infinite loop getting char 0 when the
* line is in a wrong HW state, we break that here.