serdev: ttyport: check whether tty_init_dev() fails

My static checker complains that we don't have any error handling here.
It's simple enough to add it.

Fixes: bed35c6dfa6a ("serdev: add a tty port controller driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serdev/serdev-ttyport.c b/drivers/tty/serdev/serdev-ttyport.c
index 683320b81a2b374d1c07537f33e57d39cba1b939..d05393594f1505b4e82686e417114adfcf1d1e80 100644 (file)
--- a/drivers/tty/serdev/serdev-ttyport.c
+++ b/drivers/tty/serdev/serdev-ttyport.c
@@ -97,6 +97,8 @@ static int ttyport_open(struct serdev_controller *ctrl)
        struct ktermios ktermios;
 
        tty = tty_init_dev(serport->tty_drv, serport->tty_idx);
+       if (IS_ERR(tty))
+               return PTR_ERR(tty);
        serport->tty = tty;
 
        serport->port->client_ops = &client_ops;