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Subject[PATCH v4 01/15] software_node: Fix refcounts in software_node_get_next_child()
Date
The software_node_get_next_child() function currently does not hold
references to the child software_node that it finds or put the ref that
is held against the old child - fix that.

Fixes: 59abd83672f7 ("drivers: base: Introducing software nodes to the firmware node framework")
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Daniel Scally <djrscally@gmail.com>
---
Changes in v4:

- None

drivers/base/swnode.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c
index 010828fc785b..615a0c93e116 100644
--- a/drivers/base/swnode.c
+++ b/drivers/base/swnode.c
@@ -443,14 +443,18 @@ software_node_get_next_child(const struct fwnode_handle *fwnode,
struct swnode *c = to_swnode(child);

if (!p || list_empty(&p->children) ||
- (c && list_is_last(&c->entry, &p->children)))
+ (c && list_is_last(&c->entry, &p->children))) {
+ fwnode_handle_put(child);
return NULL;
+ }

if (c)
c = list_next_entry(c, entry);
else
c = list_first_entry(&p->children, struct swnode, entry);
- return &c->fwnode;
+
+ fwnode_handle_put(child);
+ return fwnode_handle_get(&c->fwnode);
}

static struct fwnode_handle *
--
2.25.1
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