diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-agn-sta.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn-sta.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-sta.c b/drivers/net/wireless/iwlwifi/iwl-agn-sta.c index 79cbaab79ddd..42af9f94d7d9 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn-sta.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn-sta.c @@ -170,6 +170,50 @@ int iwl_send_add_sta(struct iwl_priv *priv, return cmd.handler_status; } +static bool iwl_is_channel_extension(struct iwl_priv *priv, + enum ieee80211_band band, + u16 channel, u8 extension_chan_offset) +{ + const struct iwl_channel_info *ch_info; + + ch_info = iwl_get_channel_info(priv, band, channel); + if (!is_channel_valid(ch_info)) + return false; + + if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE) + return !(ch_info->ht40_extension_channel & + IEEE80211_CHAN_NO_HT40PLUS); + else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW) + return !(ch_info->ht40_extension_channel & + IEEE80211_CHAN_NO_HT40MINUS); + + return false; +} + +bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv, + struct iwl_rxon_context *ctx, + struct ieee80211_sta_ht_cap *ht_cap) +{ + if (!ctx->ht.enabled || !ctx->ht.is_40mhz) + return false; + + /* + * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40 + * the bit will not set if it is pure 40MHz case + */ + if (ht_cap && !ht_cap->ht_supported) + return false; + +#ifdef CONFIG_IWLWIFI_DEBUGFS + if (priv->disable_ht40) + return false; +#endif + + return iwl_is_channel_extension(priv, priv->band, + le16_to_cpu(ctx->staging.channel), + ctx->ht.extension_chan_offset); +} + static void iwl_sta_calc_ht_flags(struct iwl_priv *priv, struct ieee80211_sta *sta, struct iwl_rxon_context *ctx, |