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Commit fea9bced authored by Johannes Berg's avatar Johannes Berg
Browse files

regulatory: don't test list before iterating 



There's no need to test whether a list is
empty or not before iterating.

Acked-by: default avatarLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent e9763c3c

net/wireless/reg.c

+19 −47
Original line number Diff line number Diff line
@@ -1104,9 +1104,6 @@ static void wiphy_update_beacon_reg(struct wiphy *wiphy) 


	assert_cfg80211_lock();



	if (list_empty(&reg_beacon_list))

		return;



	list_for_each_entry(reg_beacon, &reg_beacon_list, list) {

		if (!wiphy->bands[reg_beacon->chan.band])

			continue;
@@ -1666,11 +1663,6 @@ static void reg_process_pending_beacon_hints(void) 
	/* This goes through the _pending_ beacon list */

	spin_lock_bh(&reg_pending_beacons_lock);



	if (list_empty(&reg_pending_beacons)) {

		spin_unlock_bh(&reg_pending_beacons_lock);

		goto out;

	}



	list_for_each_entry_safe(pending_beacon, tmp,

				 &reg_pending_beacons, list) {
@@ -1685,7 +1677,6 @@ static void reg_process_pending_beacon_hints(void) 
	}



	spin_unlock_bh(&reg_pending_beacons_lock);

out:

	mutex_unlock(&cfg80211_mutex);

}
@@ -1949,35 +1940,25 @@ static void restore_regulatory_settings(bool reset_user) 
	 * settings.

	 */

	spin_lock(&reg_requests_lock);

	if (!list_empty(&reg_requests_list)) {

		list_for_each_entry_safe(reg_request, tmp,

					 &reg_requests_list, list) {

			if (reg_request->initiator !=

			    NL80211_REGDOM_SET_BY_USER)

	list_for_each_entry_safe(reg_request, tmp, &reg_requests_list, list) {

		if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER)

			continue;

		list_move_tail(&reg_request->list, &tmp_reg_req_list);

	}

	}

	spin_unlock(&reg_requests_lock);



	/* Clear beacon hints */

	spin_lock_bh(&reg_pending_beacons_lock);

	if (!list_empty(&reg_pending_beacons)) {

		list_for_each_entry_safe(reg_beacon, btmp,

					 &reg_pending_beacons, list) {

	list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {

		list_del(&reg_beacon->list);

		kfree(reg_beacon);

	}

	}

	spin_unlock_bh(&reg_pending_beacons_lock);



	if (!list_empty(&reg_beacon_list)) {

		list_for_each_entry_safe(reg_beacon, btmp,

					 &reg_beacon_list, list) {

	list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {

		list_del(&reg_beacon->list);

		kfree(reg_beacon);

	}

	}



	/* First restore to the basic regulatory settings */

	cfg80211_regdomain = cfg80211_world_regdom;
@@ -2490,31 +2471,22 @@ void /* __init_or_exit */ regulatory_exit(void) 
	platform_device_unregister(reg_pdev);



	spin_lock_bh(&reg_pending_beacons_lock);

	if (!list_empty(&reg_pending_beacons)) {

		list_for_each_entry_safe(reg_beacon, btmp,

					 &reg_pending_beacons, list) {

	list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {

		list_del(&reg_beacon->list);

		kfree(reg_beacon);

	}

	}

	spin_unlock_bh(&reg_pending_beacons_lock);



	if (!list_empty(&reg_beacon_list)) {

		list_for_each_entry_safe(reg_beacon, btmp,

					 &reg_beacon_list, list) {

	list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {

		list_del(&reg_beacon->list);

		kfree(reg_beacon);

	}

	}



	spin_lock(&reg_requests_lock);

	if (!list_empty(&reg_requests_list)) {

		list_for_each_entry_safe(reg_request, tmp,

					 &reg_requests_list, list) {

	list_for_each_entry_safe(reg_request, tmp, &reg_requests_list, list) {

		list_del(&reg_request->list);

		kfree(reg_request);

	}

	}

	spin_unlock(&reg_requests_lock);



	mutex_unlock(&reg_mutex);