[PATCH net] net: lapb: Decrease the refcount of "struct lapb_cb" in lapb_device_event

[Xie He]

In lapb_device_event, lapb_devtostruct is called to get a reference to
an object of "struct lapb_cb". lapb_devtostruct increases the refcount
of the object and returns a pointer to it. However, we didn't decrease
the refcount after we finished using the pointer. This patch fixes this
problem.

Fixes: a4989fa91110 ("net/lapb: support netdev events")
Cc: Martin Schiller <m...@dev.tdt.de>
Signed-off-by: Xie He <xie.he.0...@gmail.com>
---
 net/lapb/lapb_iface.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/lapb/lapb_iface.c b/net/lapb/lapb_iface.c
index 213ea7abc9ab..40961889e9c0 100644
--- a/net/lapb/lapb_iface.c
+++ b/net/lapb/lapb_iface.c
@@ -489,6 +489,7 @@ static int lapb_device_event(struct notifier_block *this, 
unsigned long event,
                break;
        }
 
+       lapb_put(lapb);
        return NOTIFY_DONE;
 }
 
-- 
2.27.0