diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/mac80211/chan.c | 49 | ||||
| -rw-r--r-- | net/mac80211/ieee80211_i.h | 4 |
2 files changed, 53 insertions, 0 deletions
diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c index 78dbb371f16..78c0d90dd64 100644 --- a/net/mac80211/chan.c +++ b/net/mac80211/chan.c @@ -375,6 +375,55 @@ int ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata, return ret; } +int ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata, + const struct cfg80211_chan_def *chandef, + u32 *changed) +{ + struct ieee80211_local *local = sdata->local; + struct ieee80211_chanctx_conf *conf; + struct ieee80211_chanctx *ctx; + int ret; + + if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, + IEEE80211_CHAN_DISABLED)) + return -EINVAL; + + mutex_lock(&local->chanctx_mtx); + if (cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) { + ret = 0; + goto out; + } + + if (chandef->width == NL80211_CHAN_WIDTH_20_NOHT || + sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT) { + ret = -EINVAL; + goto out; + } + + 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 (!cfg80211_chandef_compatible(&conf->def, chandef)) { + ret = -EINVAL; + goto out; + } + + sdata->vif.bss_conf.chandef = *chandef; + + ieee80211_recalc_chanctx_chantype(local, ctx); + + *changed |= BSS_CHANGED_BANDWIDTH; + ret = 0; + out: + mutex_unlock(&local->chanctx_mtx); + return ret; +} + void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata) { WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev)); diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 892bac64a18..d1074442f1b 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -1613,6 +1613,10 @@ int __must_check ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata, const struct cfg80211_chan_def *chandef, enum ieee80211_chanctx_mode mode); +int __must_check +ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata, + const struct cfg80211_chan_def *chandef, + u32 *changed); void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata); void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata); void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, |