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Commit 5ad6ef5e authored by Luis R. Rodriguez's avatar Luis R. Rodriguez Committed by Johannes Berg
Browse files

cfg80211: add helper for kfree'ing last_request 



This is common code, this reduces the chance of making
a mistake of how we free it.

Signed-off-by: default avatarLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 2f1c6c57

net/wireless/reg.c

+19 −23
Original line number Diff line number Diff line
@@ -202,11 +202,20 @@ 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)

{

	struct regulatory_request *lr;



	lr = get_last_request();



	if (lr != &core_request_world && lr)

		kfree_rcu(lr, rcu_head);

}



static void reset_regdomains(bool full_reset,

			     const struct ieee80211_regdomain *new_regdom)

{

	const struct ieee80211_regdomain *r;

	struct regulatory_request *lr;



	ASSERT_RTNL();
@@ -229,9 +238,7 @@ static void reset_regdomains(bool full_reset, 
	if (!full_reset)

		return;



	lr = get_last_request();

	if (lr != &core_request_world && lr)

		kfree_rcu(lr, rcu_head);

	reg_kfree_last_request();

	rcu_assign_pointer(last_request, &core_request_world);

}
@@ -1353,14 +1360,11 @@ static void reg_set_request_processed(void) 
static enum reg_request_treatment

reg_process_hint_core(struct regulatory_request *core_request)

{

	struct regulatory_request *lr;



	lr = get_last_request();

	if (lr != &core_request_world && lr)

		kfree_rcu(lr, rcu_head);



	core_request->intersect = false;

	core_request->processed = false;



	reg_kfree_last_request();

	rcu_assign_pointer(last_request, core_request);



	if (call_crda(core_request->alpha2))
@@ -1417,7 +1421,6 @@ static enum reg_request_treatment 
reg_process_hint_user(struct regulatory_request *user_request)

{

	enum reg_request_treatment treatment;

	struct regulatory_request *lr;



	treatment = __reg_process_hint_user(user_request);

	if (treatment == REG_REQ_IGNORE ||
@@ -1426,12 +1429,10 @@ reg_process_hint_user(struct regulatory_request *user_request) 
		return treatment;

	}



	lr = get_last_request();

	if (lr != &core_request_world && lr)

		kfree_rcu(lr, rcu_head);



	user_request->intersect = treatment == REG_REQ_INTERSECT;

	user_request->processed = false;



	reg_kfree_last_request();

	rcu_assign_pointer(last_request, user_request);



	user_alpha2[0] = user_request->alpha2[0];
@@ -1480,7 +1481,6 @@ reg_process_hint_driver(struct wiphy *wiphy, 
{

	const struct ieee80211_regdomain *regd;

	enum reg_request_treatment treatment;

	struct regulatory_request *lr;



	treatment = __reg_process_hint_driver(driver_request);
@@ -1501,12 +1501,11 @@ reg_process_hint_driver(struct wiphy *wiphy, 
		rcu_assign_pointer(wiphy->regd, regd);

	}



	lr = get_last_request();

	if (lr != &core_request_world && lr)

		kfree_rcu(lr, rcu_head);



	driver_request->intersect = treatment == REG_REQ_INTERSECT;

	driver_request->processed = false;



	reg_kfree_last_request();

	rcu_assign_pointer(last_request, driver_request);



	/*
@@ -1581,7 +1580,6 @@ reg_process_hint_country_ie(struct wiphy *wiphy, 
			    struct regulatory_request *country_ie_request)

{

	enum reg_request_treatment treatment;

	struct regulatory_request *lr;



	treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
@@ -1603,12 +1601,10 @@ reg_process_hint_country_ie(struct wiphy *wiphy, 
		return REG_REQ_IGNORE;

	}



	lr = get_last_request();

	if (lr != &core_request_world && lr)

		kfree_rcu(lr, rcu_head);



	country_ie_request->intersect = false;

	country_ie_request->processed = false;



	reg_kfree_last_request();

	rcu_assign_pointer(last_request, country_ie_request);



	if (call_crda(country_ie_request->alpha2))