serial_match_port() uses devt to match devices. However, when serdev
registers a tty port, devt has never been set. This makes
device_find_child() always return NULL.
Assign devt in serdev_tty_port_register() to fix this.
Signed-off-by: Claire Chang <tientzu@xxxxxxxxxxxx>
---
drivers/tty/serdev/serdev-ttyport.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/tty/serdev/serdev-ttyport.c b/drivers/tty/serdev/serdev-ttyport.c
index d367803e2044f..9238119173a47 100644
--- a/drivers/tty/serdev/serdev-ttyport.c
+++ b/drivers/tty/serdev/serdev-ttyport.c
@@ -267,6 +267,7 @@ struct device *serdev_tty_port_register(struct tty_port *port,
{
struct serdev_controller *ctrl;
struct serport *serport;
+ dev_t devt = MKDEV(drv->major, drv->minor_start) + idx;
int ret;
if (!port || !drv || !parent)
@@ -282,6 +283,7 @@ struct device *serdev_tty_port_register(struct tty_port *port,
serport->tty_drv = drv;
ctrl->ops = &ctrl_ops;
+ ctrl->dev.devt = devt;
port->client_ops = &client_ops;
port->client_data = ctrl;
--
2.26.2.526.g744177e7f7-goog
