From: Johannes Berg <johannes.berg@xxxxxxxxx>
The uevent callback doesn't protect its access to
last_request, which now causes a warning since
the conversion to get_last_request(). Fix this.
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
net/wireless/reg.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 0b35de0..c647869 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -2250,14 +2250,21 @@ int set_regdom(const struct ieee80211_regdomain *rd)
#ifdef CONFIG_HOTPLUG
int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env)
{
- struct regulatory_request *lr = get_last_request();
+ struct regulatory_request *lr;
+ u8 alpha2[2];
+ bool add = false;
+ rcu_read_lock();
+ lr = get_last_request();
if (lr && !lr->processed) {
- if (add_uevent_var(env, "COUNTRY=%c%c",
- lr->alpha2[0], lr->alpha2[1]))
- return -ENOMEM;
+ memcpy(alpha2, lr->alpha2, 2);
+ add = true;
}
+ rcu_read_unlock();
+ if (add)
+ return add_uevent_var(env, "COUNTRY=%c%c",
+ alpha2[0], alpha2[1]);
return 0;
}
#else
--
1.8.0
--
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