linux-kernel - [RFC PATCH v3 3/9] software_node: Fix failure to hold refcount in software_node_get_next

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Message-Id: <20201019225903.14276-4-djrscally@gmail.com>
Date:   Mon, 19 Oct 2020 23:58:57 +0100
From:   Daniel Scally <djrscally@...il.com>
To:     linux-kernel@...r.kernel.org, linux-media@...r.kernel.org
Cc:     linux.walleij@...aro.org, prabhakar.mahadev-lad.rj@...renesas.com,
        heikki.krogerus@...ux.intel.com, dmitry.torokhov@...il.com,
        laurent.pinchart+renesas@...asonboard.com,
        kieran.bingham+renesas@...asonboard.com, jacopo+renesas@...ndi.org,
        robh@...nel.org, davem@...emloft.net, linux@...musvillemoes.dk,
        andriy.shevchenko@...ux.intel.com, sergey.senozhatsky@...il.com,
        rostedt@...dmis.org, pmladek@...e.com, mchehab@...nel.org,
        tian.shu.qiu@...el.com, bingbu.cao@...el.com,
        sakari.ailus@...ux.intel.com, yong.zhi@...el.com,
        rafael@...nel.org, gregkh@...uxfoundation.org, kitakar@...il.com,
        dan.carpenter@...cle.org
Subject: [RFC PATCH v3 3/9] software_node: Fix failure to hold refcount in software_node_get_next_child

The software_node_get_next_child() function currently does not hold a kref
to the child software_node; fix that.

Fixes: 59abd83672f7 ("drivers: base: Introducing software nodes to the firmware node framework")
Signed-off-by: Daniel Scally <djrscally@...il.com>
---
Changes in v3:
	- split out from the full software_node_graph*() patch

 drivers/base/swnode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c
index f01b1cc61..741149b90 100644
--- a/drivers/base/swnode.c
+++ b/drivers/base/swnode.c
@@ -450,7 +450,7 @@ software_node_get_next_child(const struct fwnode_handle *fwnode,
 		c = list_next_entry(c, entry);
 	else
 		c = list_first_entry(&p->children, struct swnode, entry);
-	return &c->fwnode;
+	return software_node_get(&c->fwnode);
 }
 
 static struct fwnode_handle *
-- 
2.17.1