staging: wilc1000: handle connect ops callback from cfg80211 context

Refactor the connect related cfg callback to be called from cfg80211
context. No need to post connect command internally in case scan is in
progress instead simply return the error status in connect ops callback.
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/host_interface.c

@@ -362,34 +362,16 @@ static void handle_scan(struct work_struct *work)
 	kfree(msg);
 }
 
-static void handle_connect(struct work_struct *work)
+static int wilc_send_connect_wid(struct wilc_vif *vif,
+				 struct connect_attr *conn_attr)
 {
-	struct host_if_msg *msg = container_of(work, struct host_if_msg, work);
-	struct wilc_vif *vif = msg->vif;
-	struct connect_attr *conn_attr = &msg->body.con_info;
 	int result = 0;
 	struct wid wid_list[8];
 	u32 wid_cnt = 0, dummyval = 0;
 	u8 *cur_byte = NULL;
-	struct join_bss_param *bss_param;
+	struct join_bss_param *bss_param = conn_attr->params;
 	struct host_if_drv *hif_drv = vif->hif_drv;
 
-	if (msg->vif->hif_drv->usr_scan_req.scan_result) {
-		result = wilc_enqueue_work(msg);
-		if (result)
-			goto error;
-
-		usleep_range(2 * 1000, 2 * 1000);
-		return;
-	}
-
-	bss_param = conn_attr->params;
-	if (!bss_param) {
-		netdev_err(vif->ndev, "Required BSSID not found\n");
-		result = -ENOENT;
-		goto error;
-	}
-
 	if (conn_attr->bssid) {
 		hif_drv->usr_conn_req.bssid = kmemdup(conn_attr->bssid, 6,
 						      GFP_KERNEL);
@@ -490,8 +472,8 @@ static void handle_connect(struct work_struct *work)
 		netdev_err(vif->ndev, "Channel out of range\n");
 		*(cur_byte++) = 0xFF;
 	}
-	*(cur_byte++)  = (bss_param->cap_info) & 0xFF;
-	*(cur_byte++)  = ((bss_param->cap_info) >> 8) & 0xFF;
+	put_unaligned_le16(bss_param->cap_info, cur_byte);
+	cur_byte += 2;
 
 	if (conn_attr->bssid)
 		memcpy(cur_byte, conn_attr->bssid, 6);
@@ -501,8 +483,8 @@ static void handle_connect(struct work_struct *work)
 		memcpy(cur_byte, conn_attr->bssid, 6);
 	cur_byte += 6;
 
-	*(cur_byte++)  = (bss_param->beacon_period) & 0xFF;
-	*(cur_byte++)  = ((bss_param->beacon_period) >> 8) & 0xFF;
+	put_unaligned_le16(bss_param->beacon_period, cur_byte);
+	cur_byte += 2;
 	*(cur_byte++)  =  bss_param->dtim_period;
 
 	memcpy(cur_byte, bss_param->supp_rates, MAX_RATES_SUPPORTED + 1);
@@ -533,10 +515,8 @@ static void handle_connect(struct work_struct *work)
 	*(cur_byte++) = bss_param->noa_enabled;
 
 	if (bss_param->noa_enabled) {
-		*(cur_byte++) = (bss_param->tsf) & 0xFF;
-		*(cur_byte++) = ((bss_param->tsf) >> 8) & 0xFF;
-		*(cur_byte++) = ((bss_param->tsf) >> 16) & 0xFF;
-		*(cur_byte++) = ((bss_param->tsf) >> 24) & 0xFF;
+		put_unaligned_le32(bss_param->tsf, cur_byte);
+		cur_byte += 4;
 
 		*(cur_byte++) = bss_param->opp_enabled;
 		*(cur_byte++) = bss_param->idx;
@@ -616,8 +596,10 @@ static void handle_connect(struct work_struct *work)
 	kfree(conn_attr->ies);
 	conn_attr->ies = NULL;
 
+	kfree(conn_attr);
 	kfree(cur_byte);
-	kfree(msg);
+
+	return result;
 }
 
 static void handle_connect_timeout(struct work_struct *work)
@@ -1926,8 +1908,8 @@ int wilc_set_join_req(struct wilc_vif *vif, u8 *bssid, const u8 *ssid,
 		      u8 channel, void *join_params)
 {
 	int result;
-	struct host_if_msg *msg;
 	struct host_if_drv *hif_drv = vif->hif_drv;
+	struct connect_attr *con_info;
 
 	if (!hif_drv || !connect_result) {
 		netdev_err(vif->ndev,
@@ -1941,50 +1923,51 @@ int wilc_set_join_req(struct wilc_vif *vif, u8 *bssid, const u8 *ssid,
 		return -EFAULT;
 	}
 
-	msg = wilc_alloc_work(vif, handle_connect, false);
-	if (IS_ERR(msg))
-		return PTR_ERR(msg);
+	if (hif_drv->usr_scan_req.scan_result) {
+		netdev_err(vif->ndev, "%s: Scan in progress\n", __func__);
+		return -EBUSY;
+	}
+
+	con_info = kzalloc(sizeof(*con_info), GFP_KERNEL);
+	if (!con_info)
+		return -ENOMEM;
 
-	msg->body.con_info.security = security;
-	msg->body.con_info.auth_type = auth_type;
-	msg->body.con_info.ch = channel;
-	msg->body.con_info.result = connect_result;
-	msg->body.con_info.arg = user_arg;
-	msg->body.con_info.params = join_params;
+	con_info->security = security;
+	con_info->auth_type = auth_type;
+	con_info->ch = channel;
+	con_info->result = connect_result;
+	con_info->arg = user_arg;
+	con_info->params = join_params;
 
 	if (bssid) {
-		msg->body.con_info.bssid = kmemdup(bssid, 6, GFP_KERNEL);
-		if (!msg->body.con_info.bssid) {
+		con_info->bssid = kmemdup(bssid, 6, GFP_KERNEL);
+		if (!con_info->bssid) {
 			result = -ENOMEM;
-			goto free_msg;
+			goto free_con_info;
 		}
 	}
 
 	if (ssid) {
-		msg->body.con_info.ssid_len = ssid_len;
-		msg->body.con_info.ssid = kmemdup(ssid, ssid_len, GFP_KERNEL);
-		if (!msg->body.con_info.ssid) {
+		con_info->ssid_len = ssid_len;
+		con_info->ssid = kmemdup(ssid, ssid_len, GFP_KERNEL);
+		if (!con_info->ssid) {
 			result = -ENOMEM;
 			goto free_bssid;
 		}
 	}
 
 	if (ies) {
-		msg->body.con_info.ies_len = ies_len;
-		msg->body.con_info.ies = kmemdup(ies, ies_len, GFP_KERNEL);
-		if (!msg->body.con_info.ies) {
+		con_info->ies_len = ies_len;
+		con_info->ies = kmemdup(ies, ies_len, GFP_KERNEL);
+		if (!con_info->ies) {
 			result = -ENOMEM;
 			goto free_ssid;
 		}
 	}
-	if (hif_drv->hif_state < HOST_IF_CONNECTING)
-		hif_drv->hif_state = HOST_IF_CONNECTING;
 
-	result = wilc_enqueue_work(msg);
-	if (result) {
-		netdev_err(vif->ndev, "%s: enqueue work failed\n", __func__);
+	result = wilc_send_connect_wid(vif);
+	if (result)
 		goto free_ies;
-	}
 
 	hif_drv->connect_timer_vif = vif;
 	mod_timer(&hif_drv->connect_timer,
@@ -1993,16 +1976,17 @@ int wilc_set_join_req(struct wilc_vif *vif, u8 *bssid, const u8 *ssid,
 	return 0;
 
 free_ies:
-	kfree(msg->body.con_info.ies);
+	kfree(con_info->ies);
 
 free_ssid:
-	kfree(msg->body.con_info.ssid);
+	kfree(con_info->ssid);
 
 free_bssid:
-	kfree(msg->body.con_info.bssid);
+	kfree(con_info->bssid);
+
+free_con_info:
+	kfree(con_info);
 
-free_msg:
-	kfree(msg);
 	return result;
 }