Subject: [PATCH v2 3/4] net: bridge: replace deprecated simple_strtoul with kstrtoul

From: Eric-Terminal <[email-masked]>
Date: Wed, 25 Feb 2026 11:38:39 +0800

From: Yufan Chen <[email-masked]>

Replace simple_strtoul() in brport_store() with kstrtoul() so
conversion failures and range errors are returned as standard errno.

This keeps parsing strict and removes deprecated helper usage.

Signed-off-by: Yufan Chen <[email-masked]>
---
 net/bridge/br_sysfs_if.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/net/bridge/br_sysfs_if.c b/net/bridge/br_sysfs_if.c
index 1f57c36a7..cdecc7d12 100644
--- a/net/bridge/br_sysfs_if.c
+++ b/net/bridge/br_sysfs_if.c
@@ -318,7 +318,6 @@ static ssize_t brport_store(struct kobject *kobj,
 	struct net_bridge_port *p = kobj_to_brport(kobj);
 	ssize_t ret = -EINVAL;
 	unsigned long val;
-	char *endp;
 
 	if (!ns_capable(dev_net(p->dev)->user_ns, CAP_NET_ADMIN))
 		return -EPERM;
@@ -339,8 +338,8 @@ static ssize_t brport_store(struct kobject *kobj,
 		spin_unlock_bh(&p->br->lock);
 		kfree(buf_copy);
 	} else if (brport_attr->store) {
-		val = simple_strtoul(buf, &endp, 0);
-		if (endp == buf)
+		ret = kstrtoul(buf, 0, &val);
+		if (ret)
 			goto out_unlock;
 		spin_lock_bh(&p->br->lock);
 		ret = brport_attr->store(p, val);
-- 
2.47.3