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Commit d951c1dd authored by Luis R. Rodriguez's avatar Luis R. Rodriguez Committed by John W. Linville
Browse files

cfg80211: do not kzalloc() again for a new request on __regulatory_hint 



Since we already have a regulatory request from the workqueue use that
and avoid a new kzalloc()

Signed-off-by: default avatarLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 28da32d7

net/wireless/reg.c

+16 −38
Original line number Diff line number Diff line
@@ -1341,7 +1341,6 @@ static int ignore_request(struct wiphy *wiphy, enum reg_set_by set_by, 
static int __regulatory_hint(struct wiphy *wiphy,

			     struct regulatory_request *pending_request)

{

	struct regulatory_request *request;

	bool intersect = false;

	int r = 0;
@@ -1354,9 +1353,11 @@ static int __regulatory_hint(struct wiphy *wiphy, 
	if (r == REG_INTERSECT) {

		if (pending_request->initiator == REGDOM_SET_BY_DRIVER) {

			r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain);

			if (r)

			if (r) {

				kfree(pending_request);

				return r;

			}

		}

		intersect = true;

	} else if (r) {

		/*
@@ -1367,30 +1368,24 @@ static int __regulatory_hint(struct wiphy *wiphy, 
		if (r == -EALREADY &&

		    pending_request->initiator == REGDOM_SET_BY_DRIVER) {

			r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain);

			if (r)

			if (r) {

				kfree(pending_request);

				return r;

			}

			r = -EALREADY;

			goto new_request;

		}

		kfree(pending_request);

		return r;

	}



new_request:

	request = kzalloc(sizeof(struct regulatory_request),

			  GFP_KERNEL);

	if (!request)

		return -ENOMEM;

	kfree(last_request);



	request->alpha2[0] = pending_request->alpha2[0];

	request->alpha2[1] = pending_request->alpha2[1];

	request->initiator = pending_request->initiator;

	request->wiphy_idx = pending_request->wiphy_idx;

	request->intersect = intersect;

	request->country_ie_checksum = pending_request->country_ie_checksum;

	request->country_ie_env = pending_request->country_ie_env;

	last_request = pending_request;

	last_request->intersect = intersect;



	kfree(last_request);

	last_request = request;

	pending_request = NULL;



	/* When r == REG_INTERSECT we do need to call CRDA */

	if (r < 0)
@@ -1406,11 +1401,11 @@ static int __regulatory_hint(struct wiphy *wiphy, 
	 *

	 * to intersect with the static rd

	 */

	return call_crda(request->alpha2);

	return call_crda(last_request->alpha2);

}



/* This currently only processes user and driver regulatory hints */

static int reg_process_hint(struct regulatory_request *reg_request)

static void reg_process_hint(struct regulatory_request *reg_request)

{

	int r = 0;

	struct wiphy *wiphy = NULL;
@@ -1424,7 +1419,7 @@ static int reg_process_hint(struct regulatory_request *reg_request) 


	if (reg_request->initiator == REGDOM_SET_BY_DRIVER &&

	    !wiphy) {

		r = -ENODEV;

		kfree(reg_request);

		goto out;

	}
@@ -1434,18 +1429,12 @@ static int reg_process_hint(struct regulatory_request *reg_request) 
		wiphy_update_regulatory(wiphy, reg_request->initiator);

out:

	mutex_unlock(&cfg80211_mutex);



	if (r == -EALREADY)

		r = 0;



	return r;

}



/* Processes regulatory hints, this is all the REGDOM_SET_BY_* */

static void reg_process_pending_hints(void)

	{

	struct regulatory_request *reg_request;

	int r;



	spin_lock(&reg_requests_lock);

	while (!list_empty(&reg_requests_list)) {
@@ -1453,20 +1442,9 @@ static void reg_process_pending_hints(void) 
					       struct regulatory_request,

					       list);

		list_del_init(&reg_request->list);

		spin_unlock(&reg_requests_lock);



		r = reg_process_hint(reg_request);

#ifdef CONFIG_CFG80211_REG_DEBUG

		if (r && (reg_request->initiator == REGDOM_SET_BY_DRIVER ||

		    reg_request->initiator == REGDOM_SET_BY_COUNTRY_IE))

			printk(KERN_ERR "cfg80211: wiphy_idx %d sent a "

				"regulatory hint for %c%c but now has "

				"gone fishing, ignoring request\n",

				reg_request->wiphy_idx,

				reg_request->alpha2[0],

				reg_request->alpha2[1]);

#endif

		kfree(reg_request);

		spin_unlock(&reg_requests_lock);

		reg_process_hint(reg_request);

		spin_lock(&reg_requests_lock);

	}

	spin_unlock(&reg_requests_lock);