From: Yang Yingliang <yangyingliang@xxxxxxxxxx>
[ Upstream commit 39af728649b05e88a2b40e714feeee6451c3f18e ]
The 'parent' returned by fwnode_graph_get_port_parent()
with refcount incremented when 'prev' is not NULL, it
needs be put when finish using it.
Because the parent is const, introduce a new variable to
store the returned fwnode, then put it before returning
from fwnode_graph_get_next_endpoint().
Fixes: b5b41ab6b0c1 ("device property: Check fwnode->secondary in fwnode_graph_get_next_endpoint()")
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Reviewed-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Reviewed-and-tested-by: Daniel Scally <djrscally@xxxxxxxxx>
Link: https://lore.kernel.org/r/20221123022542.2999510-1-yangyingliang@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/base/property.c | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)
diff --git a/drivers/base/property.c b/drivers/base/property.c
index 735a23db1b5e..17a648d64356 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -1055,26 +1055,32 @@ struct fwnode_handle *
fwnode_graph_get_next_endpoint(const struct fwnode_handle *fwnode,
struct fwnode_handle *prev)
{
+ struct fwnode_handle *ep, *port_parent = NULL;
const struct fwnode_handle *parent;
- struct fwnode_handle *ep;
/*
* If this function is in a loop and the previous iteration returned
* an endpoint from fwnode->secondary, then we need to use the secondary
* as parent rather than @fwnode.
*/
- if (prev)
- parent = fwnode_graph_get_port_parent(prev);
- else
+ if (prev) {
+ port_parent = fwnode_graph_get_port_parent(prev);
+ parent = port_parent;
+ } else {
parent = fwnode;
+ }
if (IS_ERR_OR_NULL(parent))
return NULL;
ep = fwnode_call_ptr_op(parent, graph_get_next_endpoint, prev);
if (ep)
- return ep;
+ goto out_put_port_parent;
+
+ ep = fwnode_graph_get_next_endpoint(parent->secondary, NULL);
- return fwnode_graph_get_next_endpoint(parent->secondary, NULL);
+out_put_port_parent:
+ fwnode_handle_put(port_parent);
+ return ep;
}
EXPORT_SYMBOL_GPL(fwnode_graph_get_next_endpoint);
--
2.39.0
