diff options
| -rw-r--r-- | net/mac80211/chan.c | 58 |
1 files changed, 33 insertions, 25 deletions
diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c index db0a3449..503ee30 100644 --- a/net/mac80211/chan.c +++ b/net/mac80211/chan.c @@ -570,39 +570,20 @@ int ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata, return ret; } -int ieee80211_vif_change_channel(struct ieee80211_sub_if_data *sdata, - u32 *changed) +static int __ieee80211_vif_change_channel(struct ieee80211_sub_if_data *sdata, + struct ieee80211_chanctx *ctx, + u32 *changed) { struct ieee80211_local *local = sdata->local; - struct ieee80211_chanctx_conf *conf; - struct ieee80211_chanctx *ctx; const struct cfg80211_chan_def *chandef = &sdata->csa_chandef; - int ret; u32 chanctx_changed = 0; - lockdep_assert_held(&local->mtx); - - /* should never be called if not performing a channel switch. */ - if (WARN_ON(!sdata->vif.csa_active)) - return -EINVAL; - if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, IEEE80211_CHAN_DISABLED)) return -EINVAL; - mutex_lock(&local->chanctx_mtx); - conf = rcu_dereference_protected(sdata->vif.chanctx_conf, - lockdep_is_held(&local->chanctx_mtx)); - if (!conf) { - ret = -EINVAL; - goto out; - } - - ctx = container_of(conf, struct ieee80211_chanctx, conf); - if (ctx->refcount != 1) { - ret = -EINVAL; - goto out; - } + if (ctx->refcount != 1) + return -EINVAL; if (sdata->vif.bss_conf.chandef.width != chandef->width) { chanctx_changed = IEEE80211_CHANCTX_CHANGE_WIDTH; @@ -620,7 +601,34 @@ int ieee80211_vif_change_channel(struct ieee80211_sub_if_data *sdata, ieee80211_recalc_radar_chanctx(local, ctx); ieee80211_recalc_chanctx_min_def(local, ctx); - ret = 0; + return 0; +} + +int ieee80211_vif_change_channel(struct ieee80211_sub_if_data *sdata, + u32 *changed) +{ + struct ieee80211_local *local = sdata->local; + struct ieee80211_chanctx_conf *conf; + struct ieee80211_chanctx *ctx; + int ret; + + lockdep_assert_held(&local->mtx); + + /* should never be called if not performing a channel switch. */ + if (WARN_ON(!sdata->vif.csa_active)) + return -EINVAL; + + mutex_lock(&local->chanctx_mtx); + conf = rcu_dereference_protected(sdata->vif.chanctx_conf, + lockdep_is_held(&local->chanctx_mtx)); + if (!conf) { + ret = -EINVAL; + goto out; + } + + ctx = container_of(conf, struct ieee80211_chanctx, conf); + + ret = __ieee80211_vif_change_channel(sdata, ctx, changed); out: mutex_unlock(&local->chanctx_mtx); return ret; |