mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-09 21:41:53 +02:00
2bfe8f2518
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16562 3c298f89-4303-0410-b956-a3cf2f4a3e73
118 lines
3.3 KiB
Diff
118 lines
3.3 KiB
Diff
From: Johannes Berg <johannes@sipsolutions.net>
|
|
Subject: mac80211: fix todo lock
|
|
|
|
The key todo lock can be taken from different locks
|
|
that require it to be _bh to avoid lock inversion
|
|
due to (soft)irqs.
|
|
|
|
This should fix the two problems reported by Bob and
|
|
Gabor:
|
|
http://mid.gmane.org/20090619113049.GB18956@hash.localnet
|
|
http://mid.gmane.org/4A3FA376.8020307@openwrt.org
|
|
|
|
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
|
|
Cc: Bob Copeland <me@bobcopeland.com>
|
|
Cc: Gabor Juhos <juhosg@openwrt.org>
|
|
---
|
|
net/mac80211/key.c | 28 +++++++++++++++-------------
|
|
1 file changed, 15 insertions(+), 13 deletions(-)
|
|
|
|
--- a/net/mac80211/key.c
|
|
+++ b/net/mac80211/key.c
|
|
@@ -70,6 +70,8 @@ static DECLARE_WORK(todo_work, key_todo)
|
|
*
|
|
* @key: key to add to do item for
|
|
* @flag: todo flag(s)
|
|
+ *
|
|
+ * Must be called with IRQs or softirqs disabled.
|
|
*/
|
|
static void add_todo(struct ieee80211_key *key, u32 flag)
|
|
{
|
|
@@ -143,9 +145,9 @@ static void ieee80211_key_enable_hw_acce
|
|
ret = drv_set_key(key->local, SET_KEY, &sdata->vif, sta, &key->conf);
|
|
|
|
if (!ret) {
|
|
- spin_lock(&todo_lock);
|
|
+ spin_lock_bh(&todo_lock);
|
|
key->flags |= KEY_FLAG_UPLOADED_TO_HARDWARE;
|
|
- spin_unlock(&todo_lock);
|
|
+ spin_unlock_bh(&todo_lock);
|
|
}
|
|
|
|
if (ret && ret != -ENOSPC && ret != -EOPNOTSUPP)
|
|
@@ -167,12 +169,12 @@ static void ieee80211_key_disable_hw_acc
|
|
if (!key || !key->local->ops->set_key)
|
|
return;
|
|
|
|
- spin_lock(&todo_lock);
|
|
+ spin_lock_bh(&todo_lock);
|
|
if (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)) {
|
|
- spin_unlock(&todo_lock);
|
|
+ spin_unlock_bh(&todo_lock);
|
|
return;
|
|
}
|
|
- spin_unlock(&todo_lock);
|
|
+ spin_unlock_bh(&todo_lock);
|
|
|
|
sta = get_sta_for_key(key);
|
|
sdata = key->sdata;
|
|
@@ -191,9 +193,9 @@ static void ieee80211_key_disable_hw_acc
|
|
wiphy_name(key->local->hw.wiphy),
|
|
key->conf.keyidx, sta ? sta->addr : bcast_addr, ret);
|
|
|
|
- spin_lock(&todo_lock);
|
|
+ spin_lock_bh(&todo_lock);
|
|
key->flags &= ~KEY_FLAG_UPLOADED_TO_HARDWARE;
|
|
- spin_unlock(&todo_lock);
|
|
+ spin_unlock_bh(&todo_lock);
|
|
}
|
|
|
|
static void __ieee80211_set_default_key(struct ieee80211_sub_if_data *sdata,
|
|
@@ -440,14 +442,14 @@ void ieee80211_key_link(struct ieee80211
|
|
|
|
__ieee80211_key_replace(sdata, sta, old_key, key);
|
|
|
|
- spin_unlock_irqrestore(&sdata->local->key_lock, flags);
|
|
-
|
|
/* free old key later */
|
|
add_todo(old_key, KEY_FLAG_TODO_DELETE);
|
|
|
|
add_todo(key, KEY_FLAG_TODO_ADD_DEBUGFS);
|
|
if (netif_running(sdata->dev))
|
|
add_todo(key, KEY_FLAG_TODO_HWACCEL_ADD);
|
|
+
|
|
+ spin_unlock_irqrestore(&sdata->local->key_lock, flags);
|
|
}
|
|
|
|
static void __ieee80211_key_free(struct ieee80211_key *key)
|
|
@@ -550,7 +552,7 @@ static void __ieee80211_key_todo(void)
|
|
*/
|
|
synchronize_rcu();
|
|
|
|
- spin_lock(&todo_lock);
|
|
+ spin_lock_bh(&todo_lock);
|
|
while (!list_empty(&todo_list)) {
|
|
key = list_first_entry(&todo_list, struct ieee80211_key, todo);
|
|
list_del_init(&key->todo);
|
|
@@ -561,7 +563,7 @@ static void __ieee80211_key_todo(void)
|
|
KEY_FLAG_TODO_HWACCEL_REMOVE |
|
|
KEY_FLAG_TODO_DELETE);
|
|
key->flags &= ~todoflags;
|
|
- spin_unlock(&todo_lock);
|
|
+ spin_unlock_bh(&todo_lock);
|
|
|
|
work_done = false;
|
|
|
|
@@ -594,9 +596,9 @@ static void __ieee80211_key_todo(void)
|
|
|
|
WARN_ON(!work_done);
|
|
|
|
- spin_lock(&todo_lock);
|
|
+ spin_lock_bh(&todo_lock);
|
|
}
|
|
- spin_unlock(&todo_lock);
|
|
+ spin_unlock_bh(&todo_lock);
|
|
}
|
|
|
|
void ieee80211_key_todo(void)
|