1 files changed, 19 insertions, 17 deletions

diff --git a/net/wireless/util.c b/net/wireless/util.c
index 994e2f0cc7a8..ef35f4ef2aa6 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -684,22 +684,10 @@ EXPORT_SYMBOL(cfg80211_classify8021d);
 
 const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie)
 {
-        u8 *end, *pos;
-
-        pos = bss->information_elements;
-        if (pos == NULL)
+        if (bss->information_elements == NULL)
                 return NULL;
-        end = pos + bss->len_information_elements;
-
-        while (pos + 1 < end) {
-                if (pos + 2 + pos[1] > end)
-                        break;
-                if (pos[0] == ie)
-                        return pos;
-                pos += 2 + pos[1];
-        }
-
-        return NULL;
+        return cfg80211_find_ie(ie, bss->information_elements,
+                                 bss->len_information_elements);
 }
 EXPORT_SYMBOL(ieee80211_bss_get_ie);
 
@@ -812,6 +800,10 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
         if (otype == NL80211_IFTYPE_AP_VLAN)
                 return -EOPNOTSUPP;
 
+        /* cannot change into P2P device type */
+        if (ntype == NL80211_IFTYPE_P2P_DEVICE)
+                return -EOPNOTSUPP;
+
         if (!rdev->ops->change_virtual_intf ||
             !(rdev->wiphy.interface_modes & (1 << ntype)))
                 return -EOPNOTSUPP;
@@ -889,6 +881,9 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
                 case NUM_NL80211_IFTYPES:
                         /* not happening */
                         break;
+                case NL80211_IFTYPE_P2P_DEVICE:
+                        WARN_ON(1);
+                        break;
                 }
         }
 
@@ -1053,8 +1048,15 @@ int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
         list_for_each_entry(wdev_iter, &rdev->wdev_list, list) {
                 if (wdev_iter == wdev)
                         continue;
-                if (!netif_running(wdev_iter->netdev))
-                        continue;
+                if (wdev_iter->netdev) {
+                        if (!netif_running(wdev_iter->netdev))
+                                continue;
+                } else if (wdev_iter->iftype == NL80211_IFTYPE_P2P_DEVICE) {
+                        if (!wdev_iter->p2p_started)
+                                continue;
+                } else {
+                        WARN_ON(1);
+                }
 
                 if (rdev->wiphy.software_iftypes & BIT(wdev_iter->iftype))
                         continue;