[PATCH 1/5] driver core: Add simple parameter checks for APIs device_(for_each|find)_child()
From: Zijun Hu
Date: Sat Aug 10 2024 - 20:19:17 EST
From: Zijun Hu <quic_zijuhu@xxxxxxxxxxx>
Add simple parameter checks for APIs device_(for_each|find)_child() and
device_for_each_child_reverse().
Signed-off-by: Zijun Hu <quic_zijuhu@xxxxxxxxxxx>
---
drivers/base/core.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 1688e76cb64b..b1dd8c5590dc 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -4004,7 +4004,7 @@ int device_for_each_child(struct device *parent, void *data,
struct device *child;
int error = 0;
- if (!parent->p)
+ if (!parent || !parent->p)
return 0;
klist_iter_init(&parent->p->klist_children, &i);
@@ -4034,7 +4034,7 @@ int device_for_each_child_reverse(struct device *parent, void *data,
struct device *child;
int error = 0;
- if (!parent->p)
+ if (!parent || !parent->p)
return 0;
klist_iter_init(&parent->p->klist_children, &i);
@@ -4068,7 +4068,7 @@ struct device *device_find_child(struct device *parent, void *data,
struct klist_iter i;
struct device *child;
- if (!parent)
+ if (!parent || !parent->p)
return NULL;
klist_iter_init(&parent->p->klist_children, &i);
--
2.34.1