From 04dd17822334871b23ea2862f7798fb0e0007777 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 11 May 2024 08:53:19 +0000
Subject: [PATCH] change otg to host mode
---
kernel/drivers/net/wan/lapbether.c | 24 ++++++++++++------------
1 files changed, 12 insertions(+), 12 deletions(-)
diff --git a/kernel/drivers/net/wan/lapbether.c b/kernel/drivers/net/wan/lapbether.c
index 3ec922b..24c53cc 100644
--- a/kernel/drivers/net/wan/lapbether.c
+++ b/kernel/drivers/net/wan/lapbether.c
@@ -1,13 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* "LAPB via ethernet" driver release 001
*
* This code REQUIRES 2.1.15 or higher/ NET3.038
- *
- * This module:
- * This module is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*
* This is a "pseudo" network driver to allow LAPB over Ethernet.
*
@@ -71,7 +66,7 @@
{
struct lapbethdev *lapbeth;
- list_for_each_entry_rcu(lapbeth, &lapbeth_devices, node) {
+ list_for_each_entry_rcu(lapbeth, &lapbeth_devices, node, lockdep_rtnl_is_held()) {
if (lapbeth->ethdev == dev)
return lapbeth;
}
@@ -139,10 +134,12 @@
{
unsigned char *ptr;
- skb_push(skb, 1);
-
- if (skb_cow(skb, 1))
+ if (skb_cow(skb, 1)) {
+ kfree_skb(skb);
return NET_RX_DROP;
+ }
+
+ skb_push(skb, 1);
ptr = skb->data;
*ptr = X25_IFACE_DATA;
@@ -180,7 +177,7 @@
case X25_IFACE_DISCONNECT:
if ((err = lapb_disconnect_request(dev)) != LAPB_OK)
pr_err("lapb_disconnect_request err: %d\n", err);
- /* Fall thru */
+ fallthrough;
default:
goto drop;
}
@@ -344,6 +341,9 @@
ASSERT_RTNL();
+ if (dev->type != ARPHRD_ETHER)
+ return -EINVAL;
+
ndev = alloc_netdev(sizeof(*lapbeth), "lapb%d", NET_NAME_UNKNOWN,
lapbeth_setup);
if (!ndev)
@@ -406,7 +406,7 @@
if (dev_net(dev) != &init_net)
return NOTIFY_DONE;
- if (!dev_is_ethdev(dev))
+ if (!dev_is_ethdev(dev) && !lapbeth_get_x25_dev(dev))
return NOTIFY_DONE;
switch (event) {
--
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