mwifiex: do not declare wdev as pointer

wdev is used even after del_virtual_interface handler in cfg80211
in nl80211_post_doit. Since we have freed wdev in handling of
del_virtual_intf, this can result into crash while deleting
interface.
Avoid this be not declaring wdev which part of
mwifiex_private structure but struct wireless_dev type.

Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

12 files changed, 44 insertions, 63 deletions

diff --git a/drivers/net/wireless/mwifiex/11h.c b/drivers/net/wireless/mwifiex/11h.c
index 2668e83afbb6..f23b647a1411 100644
--- a/drivers/net/wireless/mwifiex/11h.c
+++ b/drivers/net/wireless/mwifiex/11h.c
@@ -39,7 +39,7 @@ mwifiex_11h_process_infra_join(struct mwifiex_private *priv, u8 **buffer,
                 return;
 
         radio_type = mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
-        sband = priv->wdev->wiphy->bands[radio_type];
+        sband = priv->wdev.wiphy->bands[radio_type];
 
         cap = (struct mwifiex_ie_types_pwr_capability *)*buffer;
         cap->header.type = cpu_to_le16(WLAN_EID_PWR_CAPABILITY);
diff --git a/drivers/net/wireless/mwifiex/11n.c b/drivers/net/wireless/mwifiex/11n.c
index c5c83cf664d8..543148d27b01 100644
--- a/drivers/net/wireless/mwifiex/11n.c
+++ b/drivers/net/wireless/mwifiex/11n.c
@@ -39,7 +39,7 @@ int mwifiex_fill_cap_info(struct mwifiex_private *priv, u8 radio_type,
 {
         uint16_t ht_ext_cap = le16_to_cpu(ht_cap->extended_ht_cap_info);
         struct ieee80211_supported_band *sband =
-                                        priv->wdev->wiphy->bands[radio_type];
+                                        priv->wdev.wiphy->bands[radio_type];
 
         if (WARN_ON_ONCE(!sband)) {
                 dev_err(priv->adapter->dev, "Invalid radio type!\n");
@@ -314,7 +314,7 @@ mwifiex_cmd_append_11n_tlv(struct mwifiex_private *priv,
                 return ret_len;
 
         radio_type = mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
-        sband = priv->wdev->wiphy->bands[radio_type];
+        sband = priv->wdev.wiphy->bands[radio_type];
 
         if (bss_desc->bcn_ht_cap) {
                 ht_cap = (struct mwifiex_ie_types_htcap *) *buffer;
diff --git a/drivers/net/wireless/mwifiex/11n_rxreorder.c b/drivers/net/wireless/mwifiex/11n_rxreorder.c
index c7ca5b734875..a2e8817b56d8 100644
--- a/drivers/net/wireless/mwifiex/11n_rxreorder.c
+++ b/drivers/net/wireless/mwifiex/11n_rxreorder.c
@@ -45,7 +45,7 @@ static int mwifiex_11n_dispatch_amsdu_pkt(struct mwifiex_private *priv,
                 skb_trim(skb, le16_to_cpu(local_rx_pd->rx_pkt_length));
 
                 ieee80211_amsdu_to_8023s(skb, &list, priv->curr_addr,
-                                         priv->wdev->iftype, 0, false);
+                                         priv->wdev.iftype, 0, false);
 
                 while (!skb_queue_empty(&list)) {
                         rx_skb = __skb_dequeue(&list);
diff --git a/drivers/net/wireless/mwifiex/cfg80211.c b/drivers/net/wireless/mwifiex/cfg80211.c
index dd0e410559f8..9710b23f65a9 100644
--- a/drivers/net/wireless/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/mwifiex/cfg80211.c
@@ -1590,15 +1590,15 @@ static int mwifiex_cfg80211_inform_ibss_bss(struct mwifiex_private *priv)
         ie_len = ie_buf[1] + sizeof(struct ieee_types_header);
 
         band = mwifiex_band_to_radio_type(priv->curr_bss_params.band);
-        chan = __ieee80211_get_channel(priv->wdev->wiphy,
+        chan = __ieee80211_get_channel(priv->wdev.wiphy,
                         ieee80211_channel_to_frequency(bss_info.bss_chan,
                                                        band));
 
-        bss = cfg80211_inform_bss(priv->wdev->wiphy, chan,
+        bss = cfg80211_inform_bss(priv->wdev.wiphy, chan,
                                   CFG80211_BSS_FTYPE_UNKNOWN,
                                   bss_info.bssid, 0, WLAN_CAPABILITY_IBSS,
                                   0, ie_buf, ie_len, 0, GFP_KERNEL);
-        cfg80211_put_bss(priv->wdev->wiphy, bss);
+        cfg80211_put_bss(priv->wdev.wiphy, bss);
         memcpy(priv->cfg_bssid, bss_info.bssid, ETH_ALEN);
 
         return 0;
@@ -1719,12 +1719,12 @@ done:
 
                 /* Find the BSS we want using available scan results */
                 if (mode == NL80211_IFTYPE_ADHOC)
-                        bss = cfg80211_get_bss(priv->wdev->wiphy, channel,
+                        bss = cfg80211_get_bss(priv->wdev.wiphy, channel,
                                                bssid, ssid, ssid_len,
                                                WLAN_CAPABILITY_IBSS,
                                                WLAN_CAPABILITY_IBSS);
                 else
-                        bss = cfg80211_get_bss(priv->wdev->wiphy, channel,
+                        bss = cfg80211_get_bss(priv->wdev.wiphy, channel,
                                                bssid, ssid, ssid_len,
                                                WLAN_CAPABILITY_ESS,
                                                WLAN_CAPABILITY_ESS);
@@ -1781,7 +1781,7 @@ mwifiex_cfg80211_connect(struct wiphy *wiphy, struct net_device *dev,
                 return -EINVAL;
         }
 
-        if (priv->wdev && priv->wdev->current_bss) {
+        if (priv->wdev.current_bss) {
                 wiphy_warn(wiphy, "%s: already connected\n", dev->name);
                 return -EALREADY;
         }
@@ -1839,7 +1839,7 @@ mwifiex_cfg80211_connect(struct wiphy *wiphy, struct net_device *dev,
 static int mwifiex_set_ibss_params(struct mwifiex_private *priv,
                                    struct cfg80211_ibss_params *params)
 {
-        struct wiphy *wiphy = priv->wdev->wiphy;
+        struct wiphy *wiphy = priv->wdev.wiphy;
         struct mwifiex_adapter *adapter = priv->adapter;
         int index = 0, i;
         u8 config_bands = 0;
@@ -2177,7 +2177,6 @@ struct wireless_dev *mwifiex_add_virtual_intf(struct wiphy *wiphy,
         struct mwifiex_private *priv;
         struct net_device *dev;
         void *mdev_priv;
-        struct wireless_dev *wdev;
 
         if (!adapter)
                 return ERR_PTR(-EFAULT);
@@ -2193,13 +2192,8 @@ struct wireless_dev *mwifiex_add_virtual_intf(struct wiphy *wiphy,
                         return ERR_PTR(-EINVAL);
                 }
 
-                wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
-                if (!wdev)
-                        return ERR_PTR(-ENOMEM);
-
-                wdev->wiphy = wiphy;
-                priv->wdev = wdev;
-                wdev->iftype = NL80211_IFTYPE_STATION;
+                priv->wdev.wiphy = wiphy;
+                priv->wdev.iftype = NL80211_IFTYPE_STATION;
 
                 if (type == NL80211_IFTYPE_UNSPECIFIED)
                         priv->bss_mode = NL80211_IFTYPE_STATION;
@@ -2221,13 +2215,8 @@ struct wireless_dev *mwifiex_add_virtual_intf(struct wiphy *wiphy,
                         return ERR_PTR(-EINVAL);
                 }
 
-                wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
-                if (!wdev)
-                        return ERR_PTR(-ENOMEM);
-
-                priv->wdev = wdev;
-                wdev->wiphy = wiphy;
-                wdev->iftype = NL80211_IFTYPE_AP;
+                priv->wdev.wiphy = wiphy;
+                priv->wdev.iftype = NL80211_IFTYPE_AP;
 
                 priv->bss_type = MWIFIEX_BSS_TYPE_UAP;
                 priv->frame_type = MWIFIEX_DATA_FRAME_TYPE_ETH_II;
@@ -2246,17 +2235,12 @@ struct wireless_dev *mwifiex_add_virtual_intf(struct wiphy *wiphy,
                         return ERR_PTR(-EINVAL);
                 }
 
-                wdev = kzalloc(sizeof(struct wireless_dev), GFP_KERNEL);
-                if (!wdev)
-                        return ERR_PTR(-ENOMEM);
-
-                priv->wdev = wdev;
-                wdev->wiphy = wiphy;
+                priv->wdev.wiphy = wiphy;
 
                 /* At start-up, wpa_supplicant tries to change the interface
                  * to NL80211_IFTYPE_STATION if it is not managed mode.
                  */
-                wdev->iftype = NL80211_IFTYPE_P2P_CLIENT;
+                priv->wdev.iftype = NL80211_IFTYPE_P2P_CLIENT;
                 priv->bss_mode = NL80211_IFTYPE_P2P_CLIENT;
 
                 /* Setting bss_type to P2P tells firmware that this interface
@@ -2272,8 +2256,9 @@ struct wireless_dev *mwifiex_add_virtual_intf(struct wiphy *wiphy,
                 priv->bss_num = 0;
 
                 if (mwifiex_cfg80211_init_p2p_client(priv)) {
-                        wdev = ERR_PTR(-EFAULT);
-                        goto done;
+                        memset(&priv->wdev, 0, sizeof(priv->wdev));
+                        priv->wdev.iftype = NL80211_IFTYPE_UNSPECIFIED;
+                        return ERR_PTR(-EFAULT);
                 }
 
                 break;
@@ -2287,9 +2272,10 @@ struct wireless_dev *mwifiex_add_virtual_intf(struct wiphy *wiphy,
                                IEEE80211_NUM_ACS, 1);
         if (!dev) {
                 wiphy_err(wiphy, "no memory available for netdevice\n");
+                memset(&priv->wdev, 0, sizeof(priv->wdev));
+                priv->wdev.iftype = NL80211_IFTYPE_UNSPECIFIED;
                 priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
-                wdev = ERR_PTR(-ENOMEM);
-                goto done;
+                return ERR_PTR(-ENOMEM);
         }
 
         mwifiex_init_priv_params(priv, dev);
@@ -2309,7 +2295,7 @@ struct wireless_dev *mwifiex_add_virtual_intf(struct wiphy *wiphy,
                         &wiphy->bands[IEEE80211_BAND_5GHZ]->vht_cap, priv);
 
         dev_net_set(dev, wiphy_net(wiphy));
-        dev->ieee80211_ptr = priv->wdev;
+        dev->ieee80211_ptr = &priv->wdev;
         dev->ieee80211_ptr->iftype = priv->bss_mode;
         memcpy(dev->dev_addr, wiphy->perm_addr, ETH_ALEN);
         SET_NETDEV_DEV(dev, wiphy_dev(wiphy));
@@ -2330,8 +2316,9 @@ struct wireless_dev *mwifiex_add_virtual_intf(struct wiphy *wiphy,
                 free_netdev(dev);
                 priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
                 priv->netdev = NULL;
-                wdev = ERR_PTR(-EFAULT);
-                goto done;
+                memset(&priv->wdev, 0, sizeof(priv->wdev));
+                priv->wdev.iftype = NL80211_IFTYPE_UNSPECIFIED;
+                return ERR_PTR(-EFAULT);
         }
 
         sema_init(&priv->async_sem, 1);
@@ -2342,13 +2329,7 @@ struct wireless_dev *mwifiex_add_virtual_intf(struct wiphy *wiphy,
         mwifiex_dev_debugfs_init(priv);
 #endif
 
-done:
-        if (IS_ERR(wdev)) {
-                kfree(priv->wdev);
-                priv->wdev = NULL;
-        }
-
-        return wdev;
+        return &priv->wdev;
 }
 EXPORT_SYMBOL_GPL(mwifiex_add_virtual_intf);
 
@@ -2374,8 +2355,7 @@ int mwifiex_del_virtual_intf(struct wiphy *wiphy, struct wireless_dev *wdev)
         /* Clear the priv in adapter */
         priv->netdev->ieee80211_ptr = NULL;
         priv->netdev = NULL;
-        kfree(wdev);
-        priv->wdev = NULL;
+        priv->wdev.iftype = NL80211_IFTYPE_UNSPECIFIED;
 
         priv->media_connected = false;
 
diff --git a/drivers/net/wireless/mwifiex/cfp.c b/drivers/net/wireless/mwifiex/cfp.c
index f494fc7eeb62..e9df8826f124 100644
--- a/drivers/net/wireless/mwifiex/cfp.c
+++ b/drivers/net/wireless/mwifiex/cfp.c
@@ -322,9 +322,9 @@ mwifiex_get_cfp(struct mwifiex_private *priv, u8 band, u16 channel, u32 freq)
                 return cfp;
 
         if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
-                sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
+                sband = priv->wdev.wiphy->bands[IEEE80211_BAND_2GHZ];
         else
-                sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
+                sband = priv->wdev.wiphy->bands[IEEE80211_BAND_5GHZ];
 
         if (!sband) {
                 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d\n",
diff --git a/drivers/net/wireless/mwifiex/main.c b/drivers/net/wireless/mwifiex/main.c
index 99cd3604b3f3..49dec6b4dc96 100644
--- a/drivers/net/wireless/mwifiex/main.c
+++ b/drivers/net/wireless/mwifiex/main.c
@@ -1203,8 +1203,9 @@ int mwifiex_remove_card(struct mwifiex_adapter *adapter, struct semaphore *sem)
                         continue;
 
                 rtnl_lock();
-                if (priv->wdev && priv->netdev)
-                        mwifiex_del_virtual_intf(adapter->wiphy, priv->wdev);
+                if (priv->netdev &&
+                    priv->wdev.iftype != NL80211_IFTYPE_UNSPECIFIED)
+                        mwifiex_del_virtual_intf(adapter->wiphy, &priv->wdev);
                 rtnl_unlock();
         }
 
diff --git a/drivers/net/wireless/mwifiex/main.h b/drivers/net/wireless/mwifiex/main.h
index 99792b885b79..a560179cdb7b 100644
--- a/drivers/net/wireless/mwifiex/main.h
+++ b/drivers/net/wireless/mwifiex/main.h
@@ -547,7 +547,7 @@ struct mwifiex_private {
         u32 curr_bcn_size;
         /* spin lock for beacon buffer */
         spinlock_t curr_bcn_buf_lock;
-        struct wireless_dev *wdev;
+        struct wireless_dev wdev;
         struct mwifiex_chan_freq_power cfp;
         char version_str[128];
 #ifdef CONFIG_DEBUG_FS
diff --git a/drivers/net/wireless/mwifiex/scan.c b/drivers/net/wireless/mwifiex/scan.c
index e304f0731647..0ffdb7c5afd2 100644
--- a/drivers/net/wireless/mwifiex/scan.c
+++ b/drivers/net/wireless/mwifiex/scan.c
@@ -496,10 +496,10 @@ mwifiex_scan_create_channel_list(struct mwifiex_private *priv,
 
         for (band = 0; (band < IEEE80211_NUM_BANDS) ; band++) {
 
-                if (!priv->wdev->wiphy->bands[band])
+                if (!priv->wdev.wiphy->bands[band])
                         continue;
 
-                sband = priv->wdev->wiphy->bands[band];
+                sband = priv->wdev.wiphy->bands[band];
 
                 for (i = 0; (i < sband->n_channels) ; i++) {
                         ch = &sband->channels[i];
@@ -1733,10 +1733,10 @@ mwifiex_parse_single_response_buf(struct mwifiex_private *priv, u8 **bss_info,
 
                 freq = cfp ? cfp->freq : 0;
 
-                chan = ieee80211_get_channel(priv->wdev->wiphy, freq);
+                chan = ieee80211_get_channel(priv->wdev.wiphy, freq);
 
                 if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
-                        bss = cfg80211_inform_bss(priv->wdev->wiphy,
+                        bss = cfg80211_inform_bss(priv->wdev.wiphy,
                                             chan, CFG80211_BSS_FTYPE_UNKNOWN,
                                             bssid, timestamp,
                                             cap_info_bitmap, beacon_period,
@@ -1748,7 +1748,7 @@ mwifiex_parse_single_response_buf(struct mwifiex_private *priv, u8 **bss_info,
                             !memcmp(bssid, priv->curr_bss_params.bss_descriptor
                                     .mac_address, ETH_ALEN))
                                 mwifiex_update_curr_bss_params(priv, bss);
-                        cfg80211_put_bss(priv->wdev->wiphy, bss);
+                        cfg80211_put_bss(priv->wdev.wiphy, bss);
                 }
         } else {
                 dev_dbg(adapter->dev, "missing BSS channel IE\n");
diff --git a/drivers/net/wireless/mwifiex/sta_event.c b/drivers/net/wireless/mwifiex/sta_event.c
index 419e35f1dbf3..c37e8cb2dd32 100644
--- a/drivers/net/wireless/mwifiex/sta_event.c
+++ b/drivers/net/wireless/mwifiex/sta_event.c
@@ -487,7 +487,7 @@ int mwifiex_process_sta_event(struct mwifiex_private *priv)
 
         case EVENT_REMAIN_ON_CHAN_EXPIRED:
                 dev_dbg(adapter->dev, "event: Remain on channel expired\n");
-                cfg80211_remain_on_channel_expired(priv->wdev,
+                cfg80211_remain_on_channel_expired(&priv->wdev,
                                                    priv->roc_cfg.cookie,
                                                    &priv->roc_cfg.chan,
                                                    GFP_ATOMIC);
diff --git a/drivers/net/wireless/mwifiex/sta_ioctl.c b/drivers/net/wireless/mwifiex/sta_ioctl.c
index fb9c5fc83e5d..329cd515316c 100644
--- a/drivers/net/wireless/mwifiex/sta_ioctl.c
+++ b/drivers/net/wireless/mwifiex/sta_ioctl.c
@@ -219,7 +219,7 @@ static int mwifiex_process_country_ie(struct mwifiex_private *priv,
 
         if (!strncmp(priv->adapter->country_code, &country_ie[2], 2)) {
                 rcu_read_unlock();
-                wiphy_dbg(priv->wdev->wiphy,
+                wiphy_dbg(priv->wdev.wiphy,
                           "11D: skip setting domain info in FW\n");
                 return 0;
         }
diff --git a/drivers/net/wireless/mwifiex/txrx.c b/drivers/net/wireless/mwifiex/txrx.c
index 6ae133333363..ac93557cbdc9 100644
--- a/drivers/net/wireless/mwifiex/txrx.c
+++ b/drivers/net/wireless/mwifiex/txrx.c
@@ -227,7 +227,7 @@ void mwifiex_parse_tx_status_event(struct mwifiex_private *priv,
                         /* consumes ack_skb */
                         skb_complete_wifi_ack(ack_skb, !tx_status->status);
                 } else {
-                        cfg80211_mgmt_tx_status(priv->wdev, tx_info->cookie,
+                        cfg80211_mgmt_tx_status(&priv->wdev, tx_info->cookie,
                                                 ack_skb->data, ack_skb->len,
                                                 !tx_status->status, GFP_ATOMIC);
                         dev_kfree_skb_any(ack_skb);
diff --git a/drivers/net/wireless/mwifiex/util.c b/drivers/net/wireless/mwifiex/util.c
index 707319799942..308550611f22 100644
--- a/drivers/net/wireless/mwifiex/util.c
+++ b/drivers/net/wireless/mwifiex/util.c
@@ -387,7 +387,7 @@ mwifiex_process_mgmt_packet(struct mwifiex_private *priv,
         pkt_len -= ETH_ALEN + sizeof(pkt_len);
         rx_pd->rx_pkt_length = cpu_to_le16(pkt_len);
 
-        cfg80211_rx_mgmt(priv->wdev, priv->roc_cfg.chan.center_freq,
+        cfg80211_rx_mgmt(&priv->wdev, priv->roc_cfg.chan.center_freq,
                          CAL_RSSI(rx_pd->snr, rx_pd->nf), skb->data, pkt_len,
                          0);