4.19-stable review patch. If anyone has any objections, please let me know.
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From: Yang Yingliang yangyingliang@huawei.com
[ Upstream commit 402ab979b29126068e0b596b641422ff7490214c ]
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: 360b65b95bae ("[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 --- drivers/pcmcia/ds.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c index a9258f641ceed..e07bd5249f271 100644 --- a/drivers/pcmcia/ds.c +++ b/drivers/pcmcia/ds.c @@ -581,8 +581,14 @@ 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;