mwifiex: delete IEs when stop_ap

Delete custom IEs set by start_ap cfg80211 handler when stop_ap
handler is called for AP interface.
IE index required for deletion is stored in mwifiex_private
structure.

Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Kiran Divekar <dkiran@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/mwifiex/cfg80211.c

@@ -929,6 +929,9 @@ static int mwifiex_cfg80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
 {
 	struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);
 
+	if (mwifiex_del_mgmt_ies(priv))
+		wiphy_err(wiphy, "Failed to delete mgmt IEs!\n");
+
 	if (mwifiex_send_cmd_sync(priv, HostCmd_CMD_UAP_BSS_STOP,
 				  HostCmd_ACT_GEN_SET, 0, NULL)) {
 		wiphy_err(wiphy, "Failed to stop the BSS\n");

drivers/net/wireless/mwifiex/ie.c

@@ -323,3 +323,74 @@ int mwifiex_set_mgmt_ies(struct mwifiex_private *priv,
 
 	return ret;
 }
+
+/* This function removes management IE set */
+int mwifiex_del_mgmt_ies(struct mwifiex_private *priv)
+{
+	struct mwifiex_ie *beacon_ie = NULL, *pr_ie = NULL;
+	struct mwifiex_ie *ar_ie = NULL, *rsn_ie = NULL;
+	int ret = 0;
+
+	if (priv->rsn_idx != MWIFIEX_AUTO_IDX_MASK) {
+		rsn_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
+		if (!rsn_ie)
+			return -ENOMEM;
+
+		rsn_ie->ie_index = cpu_to_le16(priv->rsn_idx);
+		rsn_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
+		rsn_ie->ie_length = 0;
+		if (mwifiex_update_uap_custom_ie(priv, rsn_ie, &priv->rsn_idx,
+						 NULL, &priv->proberesp_idx,
+						 NULL, &priv->assocresp_idx)) {
+			ret = -1;
+			goto done;
+		}
+
+		priv->rsn_idx = MWIFIEX_AUTO_IDX_MASK;
+	}
+
+	if (priv->beacon_idx != MWIFIEX_AUTO_IDX_MASK) {
+		beacon_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
+		if (!beacon_ie) {
+			ret = -ENOMEM;
+			goto done;
+		}
+		beacon_ie->ie_index = cpu_to_le16(priv->beacon_idx);
+		beacon_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
+		beacon_ie->ie_length = 0;
+	}
+	if (priv->proberesp_idx != MWIFIEX_AUTO_IDX_MASK) {
+		pr_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
+		if (!pr_ie) {
+			ret = -ENOMEM;
+			goto done;
+		}
+		pr_ie->ie_index = cpu_to_le16(priv->proberesp_idx);
+		pr_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
+		pr_ie->ie_length = 0;
+	}
+	if (priv->assocresp_idx != MWIFIEX_AUTO_IDX_MASK) {
+		ar_ie = kmalloc(sizeof(struct mwifiex_ie), GFP_KERNEL);
+		if (!ar_ie) {
+			ret = -ENOMEM;
+			goto done;
+		}
+		ar_ie->ie_index = cpu_to_le16(priv->assocresp_idx);
+		ar_ie->mgmt_subtype_mask = cpu_to_le16(MWIFIEX_DELETE_MASK);
+		ar_ie->ie_length = 0;
+	}
+
+	if (beacon_ie || pr_ie || ar_ie)
+		ret = mwifiex_update_uap_custom_ie(priv,
+						   beacon_ie, &priv->beacon_idx,
+						   pr_ie, &priv->proberesp_idx,
+						   ar_ie, &priv->assocresp_idx);
+
+done:
+	kfree(beacon_ie);
+	kfree(pr_ie);
+	kfree(ar_ie);
+	kfree(rsn_ie);
+
+	return ret;
+}

drivers/net/wireless/mwifiex/main.h

@@ -1007,6 +1007,7 @@ void mwifiex_set_sys_config_invalid_data(struct mwifiex_uap_bss_param *config);
 
 int mwifiex_set_mgmt_ies(struct mwifiex_private *priv,
 			 struct cfg80211_ap_settings *params);
+int mwifiex_del_mgmt_ies(struct mwifiex_private *priv);
 u8 *mwifiex_11d_code_2_region(u8 code);
 
 #ifdef CONFIG_DEBUG_FS