From: Yang Yingliang yangyingliang@huawei.com
[ Upstream commit e92a216d16bde65d21a3227e0fb2aa0794576525 ]
If device_register() returns error, the name allocated by dev_set_name() need be freed. It should use put_device() to give up the reference in the error path, so that the name can be freed in kobject_cleanup(), and list_del() is called to delete the port from rio_mports.
Link: https://lkml.kernel.org/r/20221114152636.2939035-3-yangyingliang@huawei.com Fixes: 2aaf308b95b2 ("rapidio: rework device hierarchy and introduce mport class of devices") Signed-off-by: Yang Yingliang yangyingliang@huawei.com Cc: Alexandre Bounine alex.bou9@gmail.com Cc: Matt Porter mporter@kernel.crashing.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/rapidio/rio.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/rapidio/rio.c b/drivers/rapidio/rio.c index 38d949405618..94843c8a687e 100644 --- a/drivers/rapidio/rio.c +++ b/drivers/rapidio/rio.c @@ -2272,11 +2272,16 @@ int rio_register_mport(struct rio_mport *port) atomic_set(&port->state, RIO_DEVICE_RUNNING);
res = device_register(&port->dev); - if (res) + if (res) { dev_err(&port->dev, "RIO: mport%d registration failed ERR=%d\n", port->id, res); - else + mutex_lock(&rio_mport_list_lock); + list_del(&port->node); + mutex_unlock(&rio_mport_list_lock); + put_device(&port->dev); + } else { dev_dbg(&port->dev, "RIO: registered mport%d\n", port->id); + }
return res; }