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pcmcia: ds: fix refcount leak in pcmcia_device_add()

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[ Upstream commit 402ab979b2 ]

As the comment of device_register() says, it should use put_device()
to give up the reference in the error path. Then, insofar resources
will be freed in pcmcia_release_dev(), the error path is no longer
needed. In particular, this means that the (previously missing) dropping
of the reference to &p_dev->function_config->ref is now handled by
pcmcia_release_dev().

Fixes: 360b65b95b ("[PATCH] pcmcia: make config_t independent, add reference counting")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
[linux@dominikbrodowski.net: simplification, commit message rewrite]
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yang Yingliang 2022-11-12 17:29:23 +08:00 committed by Greg Kroah-Hartman
parent 33519ccf94
commit 5439f09724
1 changed files with 8 additions and 2 deletions
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10
drivers/pcmcia/ds.c
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@ -573,8 +573,14 @@ static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s,
pcmcia_device_query(p_dev);
if (device_register(&p_dev->dev))
goto err_unreg;
if (device_register(&p_dev->dev)) {
mutex_lock(&s->ops_mutex);
list_del(&p_dev->socket_device_list);
s->device_count--;
mutex_unlock(&s->ops_mutex);
put_device(&p_dev->dev);
return NULL;
}
return p_dev;