diff options
Diffstat (limited to 'drivers/net/wireless/ath/wcn36xx/main.c')
| -rw-r--r-- | drivers/net/wireless/ath/wcn36xx/main.c | 52 |
1 files changed, 50 insertions, 2 deletions
diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c index 517a315e259b..35bd50bcbbd5 100644 --- a/drivers/net/wireless/ath/wcn36xx/main.c +++ b/drivers/net/wireless/ath/wcn36xx/main.c @@ -372,6 +372,8 @@ static int wcn36xx_config(struct ieee80211_hw *hw, u32 changed) wcn36xx_dbg(WCN36XX_DBG_MAC, "mac config changed 0x%08x\n", changed); + mutex_lock(&wcn->conf_mutex); + if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { int ch = WCN36XX_HW_CHANNEL(wcn); wcn36xx_dbg(WCN36XX_DBG_MAC, "wcn36xx_config channel switch=%d\n", @@ -382,6 +384,8 @@ static int wcn36xx_config(struct ieee80211_hw *hw, u32 changed) } } + mutex_unlock(&wcn->conf_mutex); + return 0; } @@ -396,6 +400,8 @@ static void wcn36xx_configure_filter(struct ieee80211_hw *hw, wcn36xx_dbg(WCN36XX_DBG_MAC, "mac configure filter\n"); + mutex_lock(&wcn->conf_mutex); + *total &= FIF_ALLMULTI; fp = (void *)(unsigned long)multicast; @@ -408,6 +414,8 @@ static void wcn36xx_configure_filter(struct ieee80211_hw *hw, else if (NL80211_IFTYPE_STATION == vif->type && tmp->sta_assoc) wcn36xx_smd_set_mc_list(wcn, vif, fp); } + + mutex_unlock(&wcn->conf_mutex); kfree(fp); } @@ -471,6 +479,8 @@ static int wcn36xx_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, key_conf->key, key_conf->keylen); + mutex_lock(&wcn->conf_mutex); + switch (key_conf->cipher) { case WLAN_CIPHER_SUITE_WEP40: vif_priv->encrypt_type = WCN36XX_HAL_ED_WEP40; @@ -565,6 +575,8 @@ static int wcn36xx_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, } out: + mutex_unlock(&wcn->conf_mutex); + return ret; } @@ -725,6 +737,8 @@ static void wcn36xx_bss_info_changed(struct ieee80211_hw *hw, wcn36xx_dbg(WCN36XX_DBG_MAC, "mac bss info changed vif %p changed 0x%08x\n", vif, changed); + mutex_lock(&wcn->conf_mutex); + if (changed & BSS_CHANGED_BEACON_INFO) { wcn36xx_dbg(WCN36XX_DBG_MAC, "mac bss changed dtim period %d\n", @@ -787,7 +801,13 @@ static void wcn36xx_bss_info_changed(struct ieee80211_hw *hw, bss_conf->aid); vif_priv->sta_assoc = true; - rcu_read_lock(); + + /* + * Holding conf_mutex ensures mutal exclusion with + * wcn36xx_sta_remove() and as such ensures that sta + * won't be freed while we're operating on it. As such + * we do not need to hold the rcu_read_lock(). + */ sta = ieee80211_find_sta(vif, bss_conf->bssid); if (!sta) { wcn36xx_err("sta %pM is not found\n", @@ -811,7 +831,6 @@ static void wcn36xx_bss_info_changed(struct ieee80211_hw *hw, * place where AID is available. */ wcn36xx_smd_config_sta(wcn, vif, sta); - rcu_read_unlock(); } else { wcn36xx_dbg(WCN36XX_DBG_MAC, "disassociated bss %pM vif %pM AID=%d\n", @@ -873,6 +892,9 @@ static void wcn36xx_bss_info_changed(struct ieee80211_hw *hw, } } out: + + mutex_unlock(&wcn->conf_mutex); + return; } @@ -882,7 +904,10 @@ static int wcn36xx_set_rts_threshold(struct ieee80211_hw *hw, u32 value) struct wcn36xx *wcn = hw->priv; wcn36xx_dbg(WCN36XX_DBG_MAC, "mac set RTS threshold %d\n", value); + mutex_lock(&wcn->conf_mutex); wcn36xx_smd_update_cfg(wcn, WCN36XX_HAL_CFG_RTS_THRESHOLD, value); + mutex_unlock(&wcn->conf_mutex); + return 0; } @@ -893,8 +918,12 @@ static void wcn36xx_remove_interface(struct ieee80211_hw *hw, struct wcn36xx_vif *vif_priv = wcn36xx_vif_to_priv(vif); wcn36xx_dbg(WCN36XX_DBG_MAC, "mac remove interface vif %p\n", vif); + mutex_lock(&wcn->conf_mutex); + list_del(&vif_priv->list); wcn36xx_smd_delete_sta_self(wcn, vif->addr); + + mutex_unlock(&wcn->conf_mutex); } static int wcn36xx_add_interface(struct ieee80211_hw *hw, @@ -915,9 +944,13 @@ static int wcn36xx_add_interface(struct ieee80211_hw *hw, return -EOPNOTSUPP; } + mutex_lock(&wcn->conf_mutex); + list_add(&vif_priv->list, &wcn->vif_list); wcn36xx_smd_add_sta_self(wcn, vif); + mutex_unlock(&wcn->conf_mutex); + return 0; } @@ -930,6 +963,8 @@ static int wcn36xx_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, wcn36xx_dbg(WCN36XX_DBG_MAC, "mac sta add vif %p sta %pM\n", vif, sta->addr); + mutex_lock(&wcn->conf_mutex); + spin_lock_init(&sta_priv->ampdu_lock); sta_priv->vif = vif_priv; /* @@ -941,6 +976,9 @@ static int wcn36xx_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, sta_priv->aid = sta->aid; wcn36xx_smd_config_sta(wcn, vif, sta); } + + mutex_unlock(&wcn->conf_mutex); + return 0; } @@ -954,8 +992,13 @@ static int wcn36xx_sta_remove(struct ieee80211_hw *hw, wcn36xx_dbg(WCN36XX_DBG_MAC, "mac sta remove vif %p sta %pM index %d\n", vif, sta->addr, sta_priv->sta_index); + mutex_lock(&wcn->conf_mutex); + wcn36xx_smd_delete_sta(wcn, sta_priv->sta_index); sta_priv->vif = NULL; + + mutex_unlock(&wcn->conf_mutex); + return 0; } @@ -999,6 +1042,8 @@ static int wcn36xx_ampdu_action(struct ieee80211_hw *hw, wcn36xx_dbg(WCN36XX_DBG_MAC, "mac ampdu action action %d tid %d\n", action, tid); + mutex_lock(&wcn->conf_mutex); + switch (action) { case IEEE80211_AMPDU_RX_START: sta_priv->tid = tid; @@ -1038,6 +1083,8 @@ static int wcn36xx_ampdu_action(struct ieee80211_hw *hw, wcn36xx_err("Unknown AMPDU action\n"); } + mutex_unlock(&wcn->conf_mutex); + return 0; } @@ -1216,6 +1263,7 @@ static int wcn36xx_probe(struct platform_device *pdev) wcn = hw->priv; wcn->hw = hw; wcn->dev = &pdev->dev; + mutex_init(&wcn->conf_mutex); mutex_init(&wcn->hal_mutex); mutex_init(&wcn->scan_lock); |