Merge changes from topic "p2p-group-joining-improvement"

* changes:
  p2p: enable auto join to join a group if possible
  p2p: fallback to p2p neg after running out of GO scan attempts.
diff --git a/wpa_supplicant/hidl/1.4/hidl_manager.cpp b/wpa_supplicant/hidl/1.4/hidl_manager.cpp
index 431881c..5e74f48 100644
--- a/wpa_supplicant/hidl/1.4/hidl_manager.cpp
+++ b/wpa_supplicant/hidl/1.4/hidl_manager.cpp
@@ -1236,9 +1236,8 @@
 		return;
 
 	// For group notifications, need to use the parent iface for callbacks.
-	struct wpa_supplicant *wpa_s = wpa_group_s->parent;
-	if (p2p_iface_object_map_.find(wpa_s->ifname) ==
-	    p2p_iface_object_map_.end())
+	struct wpa_supplicant *wpa_s = getTargetP2pIfaceForGroup(wpa_group_s);
+	if (!wpa_s)
 		return;
 
 	uint32_t hidl_freq = wpa_group_s->current_bss
@@ -1279,9 +1278,8 @@
 		return;
 
 	// For group notifications, need to use the parent iface for callbacks.
-	struct wpa_supplicant *wpa_s = wpa_group_s->parent;
-	if (p2p_iface_object_map_.find(wpa_s->ifname) ==
-	    p2p_iface_object_map_.end())
+	struct wpa_supplicant *wpa_s = getTargetP2pIfaceForGroup(wpa_group_s);
+	if (!wpa_s)
 		return;
 
 	bool hidl_is_go = (std::string(role) == "GO");
@@ -1386,15 +1384,15 @@
 }
 
 void HidlManager::notifyApStaAuthorized(
-    struct wpa_supplicant *wpa_s, const u8 *sta, const u8 *p2p_dev_addr)
+    struct wpa_supplicant *wpa_group_s, const u8 *sta, const u8 *p2p_dev_addr)
 {
-	if (!wpa_s || !wpa_s->parent || !sta)
+	if (!wpa_group_s || !wpa_group_s->parent || !sta)
 		return;
-	if (p2p_iface_object_map_.find(wpa_s->parent->ifname) ==
-	    p2p_iface_object_map_.end())
+	wpa_supplicant *wpa_s = getTargetP2pIfaceForGroup(wpa_group_s);
+	if (!wpa_s)
 		return;
 	callWithEachP2pIfaceCallback(
-	    wpa_s->parent->ifname,
+	    wpa_s->ifname,
 	    std::bind(
 		&ISupplicantP2pIfaceCallback::onStaAuthorized,
 		std::placeholders::_1, sta,
@@ -1402,16 +1400,16 @@
 }
 
 void HidlManager::notifyApStaDeauthorized(
-    struct wpa_supplicant *wpa_s, const u8 *sta, const u8 *p2p_dev_addr)
+    struct wpa_supplicant *wpa_group_s, const u8 *sta, const u8 *p2p_dev_addr)
 {
-	if (!wpa_s || !wpa_s->parent || !sta)
+	if (!wpa_group_s || !wpa_group_s->parent || !sta)
 		return;
-	if (p2p_iface_object_map_.find(wpa_s->parent->ifname) ==
-	    p2p_iface_object_map_.end())
+	wpa_supplicant *wpa_s = getTargetP2pIfaceForGroup(wpa_group_s);
+	if (!wpa_s)
 		return;
 
 	callWithEachP2pIfaceCallback(
-	    wpa_s->parent->ifname,
+	    wpa_s->ifname,
 	    std::bind(
 		&ISupplicantP2pIfaceCallback::onStaDeauthorized,
 		std::placeholders::_1, sta,
@@ -1976,6 +1974,35 @@
 }
 
 /**
+ * Finds the correct |wpa_supplicant| object for P2P notifications
+ *
+ * @param wpa_s the |wpa_supplicant| that triggered the P2P event.
+ * @return appropriate |wpa_supplicant| object or NULL if not found.
+ */
+struct wpa_supplicant *HidlManager::getTargetP2pIfaceForGroup(
+	    struct wpa_supplicant *wpa_group_s)
+{
+	if (!wpa_group_s || !wpa_group_s->parent)
+		return NULL;
+
+	struct wpa_supplicant *target_wpa_s = wpa_group_s->parent;
+	if (p2p_iface_object_map_.find(target_wpa_s->ifname) !=
+	    p2p_iface_object_map_.end())
+		return target_wpa_s;
+
+	// try P2P device if available
+	if (!target_wpa_s->p2pdev || !target_wpa_s->p2pdev->p2p_mgmt)
+		return NULL;
+
+	target_wpa_s = target_wpa_s->p2pdev;
+	if (p2p_iface_object_map_.find(target_wpa_s->ifname) !=
+	    p2p_iface_object_map_.end())
+		return target_wpa_s;
+
+	return NULL;
+}
+
+/**
  * Removes the provided |ISupplicantCallback| hidl object reference
  * from our global callback list.
  *
diff --git a/wpa_supplicant/hidl/1.4/hidl_manager.h b/wpa_supplicant/hidl/1.4/hidl_manager.h
index 9df7b55..e024427 100644
--- a/wpa_supplicant/hidl/1.4/hidl_manager.h
+++ b/wpa_supplicant/hidl/1.4/hidl_manager.h
@@ -185,6 +185,8 @@
 	HidlManager(const HidlManager &) = default;
 	HidlManager &operator=(const HidlManager &) = default;
 
+	struct wpa_supplicant *getTargetP2pIfaceForGroup(
+	    struct wpa_supplicant *wpa_s);
 	void removeSupplicantCallbackHidlObject(
 	    const android::sp<ISupplicantCallback> &callback);
 	void removeP2pIfaceCallbackHidlObject(