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>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/tty/serdev/serdev-ttyport.c b/drivers/tty/serdev/serdev-ttyport.c
index 683320b81a2b..d05393594f15 100644
--- 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;