[PATCH 1/2] software node: Add comment for the first ERR_CAST() in fwnode_create_software_node()

[Zijun Hu]

From: Zijun Hu <quic_zijuhu@xxxxxxxxxxx>

ERR_CAST() is normally used to cast an error-valued pointer type to
another different type, But the first ERR_CAST() is to cast away the
const in fwnode_create_software_node().

Add comment for this unusual ERR_CAST() usage.

Signed-off-by: Zijun Hu <quic_zijuhu@xxxxxxxxxxx>
---
 drivers/base/swnode.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c
index b1726a3515f6fbe13c2186af1f74479263798e42..67040fff99b02c43999b175c2ba7e6d04322a446 100644
--- a/drivers/base/swnode.c
+++ b/drivers/base/swnode.c
@@ -933,6 +933,7 @@ fwnode_create_software_node(const struct property_entry *properties,
 	struct software_node *node;
 	struct swnode *p;
 
+	/* Only cast away the const by ERR_CAST() */
 	if (IS_ERR(parent))
 		return ERR_CAST(parent);
 

-- 
2.34.1