This addresses the RCU component of allowing us to reprocess
the last regulatory request.
Reported-by: Sander Eikelenboom <linux@xxxxxxxxxxxxxx>
Signed-off-by: Luis R. Rodriguez <mcgrof@xxxxxxxxxxxxxxxx>
---
net/wireless/reg.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 9b897fc..5be2d7c 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -244,19 +244,21 @@ static char user_alpha2[2];
module_param(ieee80211_regdom, charp, 0444);
MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
-static void reg_kfree_last_request(void)
+static void reg_kfree_last_request(struct regulatory_request *lr)
{
- struct regulatory_request *lr;
-
- lr = get_last_request();
-
if (lr != &core_request_world && lr)
kfree_rcu(lr, rcu_head);
}
static void reg_update_last_request(struct regulatory_request *request)
{
- reg_kfree_last_request();
+ struct regulatory_request *lr;
+
+ lr = get_last_request();
+ if (lr == request)
+ return;
+
+ reg_kfree_last_request(lr);
rcu_assign_pointer(last_request, request);
}
--
1.8.4.3
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