tty->port is already set when rs_open is called given we linked it by
tty_port_link_device(). If it wasn't, the tty layer would WARN loudly.
So it's pointless to set it in rs_open. Instead, use the value in
tty->port to find out the serial_state (info).
It's a fallout of commit
b19e2ca77ee4 (TTY: use tty_port_link_device)
which added tty_port_link_device here, but omitted to remove the
tty->port assignment from rs_open.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210714091314.8292-5-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
*/
static int rs_open(struct tty_struct *tty, struct file * filp)
{
- struct serial_state *info = rs_table + tty->index;
- struct tty_port *port = &info->tport;
+ struct tty_port *port = tty->port;
+ struct serial_state *info = container_of(port, struct serial_state,
+ tport);
int retval;
port->count++;
port->tty = tty;
tty->driver_data = info;
- tty->port = port;
retval = startup(tty, info);
if (retval) {