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cfg80211: allow reprocessing of pending requests

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In certain situations we want to trigger reprocessing
of the last regulatory hint. One situation in which
this makes sense is the case where the cfg80211 was
built-in to the kernel, CFG80211_INTERNAL_REGDB was not
enabled and the CRDA binary is on a partition not availble
during early boot. In such a case we want to be able to
re-process the same request at some other point.

When we are asked to re-process the same request we need
to be careful to not kfree it, addresses that.

Reported-by: Sander Eikelenboom <linux@eikelenboom.it>
Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
[rename function]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Luis R. Rodriguez 2014-02-25 17:09:40 -08:00 committed by Johannes Berg
parent b8ff416bc9
commit 255e25b0e5
1 changed files with 8 additions and 6 deletions
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14
net/wireless/reg.c
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@ -240,19 +240,21 @@ 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_free_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_free_request(lr);
rcu_assign_pointer(last_request, request);
}