From: Johannes Berg Date: Mon, 8 Sep 2008 09:05:08 +0000 (+0200) Subject: mac80211: move some RCU locking into an if branch X-Git-Tag: firefly_0821_release~17825^2~292^2~37 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=69e6c010fd5f5015d3cc64718fbe266face93770;p=firefly-linux-kernel-4.4.55.git mac80211: move some RCU locking into an if branch The if itself doesn't need to be protected, so move in the RCU locking to avoid doing anything at all when the condition isn't true. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index df12e746b03e..0abd5a4fe38d 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -2612,13 +2612,12 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, mesh_peer_accepts_plinks(elems)); } - rcu_read_lock(); - if (sdata->vif.type == IEEE80211_IF_TYPE_IBSS && elems->supp_rates && memcmp(mgmt->bssid, sdata->u.sta.bssid, ETH_ALEN) == 0) { - supp_rates = ieee80211_sta_get_rates(local, elems, band); + rcu_read_lock(); + sta = sta_info_get(local, mgmt->sa); if (sta) { u64 prev_rates; @@ -2642,9 +2641,9 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, ieee80211_ibss_add_sta(sdata, NULL, mgmt->bssid, mgmt->sa, supp_rates); } - } - rcu_read_unlock(); + rcu_read_unlock(); + } if (elems->ds_params && elems->ds_params_len == 1) freq = ieee80211_channel_to_frequency(elems->ds_params[0]);