From ee0a0132ebb0d7e9baf42e778ea9c094966ffb14 Mon Sep 17 00:00:00 2001
From: xinhe <xinhe@google.com>
Date: Tue, 4 Aug 2015 14:27:27 -0700
Subject: WiFi tethering AP says I can't use 5g in this country while in the US

b/22871989

Change-Id: I63c458c7353ecf84aa716118924364bb8f0f2844
---
 service/java/com/android/server/wifi/WifiNative.java     | 16 +++++++++++++++-
 .../java/com/android/server/wifi/WifiStateMachine.java   | 15 +++++++++++----
 service/jni/com_android_server_wifi_WifiNative.cpp       | 10 ++++++++--
 3 files changed, 34 insertions(+), 7 deletions(-)

diff --git a/service/java/com/android/server/wifi/WifiNative.java b/service/java/com/android/server/wifi/WifiNative.java
index 5afe4e512..899529ddd 100644
--- a/service/java/com/android/server/wifi/WifiNative.java
+++ b/service/java/com/android/server/wifi/WifiNative.java
@@ -1901,10 +1901,24 @@ public class WifiNative {
 
     synchronized public static int [] getChannelsForBand(int band) {
         synchronized (mLock) {
-            return getChannelsForBandNative(sWlan0Index, band);
+            if (isHalStarted()) {
+                return getChannelsForBandNative(sWlan0Index, band);
+	    } else {
+                return null;
+            }
         }
     }
 
+    private static native boolean isGetChannelsForBandSupportedNative();
+    synchronized public static boolean isGetChannelsForBandSupported(){
+        synchronized (mLock) {
+            if (isHalStarted()) {
+                return isGetChannelsForBandSupportedNative();
+	    } else {
+                return false;
+            }
+        }
+    }
 
     private static native boolean setDfsFlagNative(int iface, boolean dfsOn);
     synchronized public static boolean setDfsFlag(boolean dfsOn) {
diff --git a/service/java/com/android/server/wifi/WifiStateMachine.java b/service/java/com/android/server/wifi/WifiStateMachine.java
index 8710a039b..60148be53 100644
--- a/service/java/com/android/server/wifi/WifiStateMachine.java
+++ b/service/java/com/android/server/wifi/WifiStateMachine.java
@@ -5204,14 +5204,21 @@ public class WifiStateMachine extends StateMachine implements WifiNative.WifiPno
             if (config.apChannel == 0) {
                 config.apChannel = chooseApChannel(config.apBand);
                 if (config.apChannel == 0) {
-                    //fail to get available channel
-                    sendMessage(CMD_START_AP_FAILURE, WifiManager.SAP_START_FAILURE_NO_CHANNEL);
-                    return;
+                    if(mWifiNative.isGetChannelsForBandSupported()) {
+                        //fail to get available channel
+                        sendMessage(CMD_START_AP_FAILURE, WifiManager.SAP_START_FAILURE_NO_CHANNEL);
+                        return;
+                    } else {
+                        //for some old device, wifiHal may not be supportedget valid channels are not
+                        //supported
+                        config.apBand = 0;
+                        config.apChannel = 6;
+                    }
                 }
             }
         } else {
             //for some old device, wifiHal may not be supported
-            config.apChannel = 0;
+            config.apBand = 0;
             config.apChannel = 6;
         }
         // Start hostapd on a separate thread
diff --git a/service/jni/com_android_server_wifi_WifiNative.cpp b/service/jni/com_android_server_wifi_WifiNative.cpp
index 4291fd1a3..7556b1e67 100644
--- a/service/jni/com_android_server_wifi_WifiNative.cpp
+++ b/service/jni/com_android_server_wifi_WifiNative.cpp
@@ -1363,6 +1363,10 @@ static jboolean android_net_wifi_setScanningMacOui(JNIEnv *env, jclass cls,
     return hal_fn.wifi_set_scanning_mac_oui(handle, (byte *)bytes) == WIFI_SUCCESS;
 }
 
+static jboolean android_net_wifi_is_get_channels_for_band_supported(JNIEnv *env, jclass cls){
+    return (hal_fn.wifi_get_valid_channels == wifi_get_valid_channels_stub);
+}
+
 static jintArray android_net_wifi_getValidChannels(JNIEnv *env, jclass cls,
         jint iface, jint band)  {
 
@@ -2194,9 +2198,11 @@ static JNINativeMethod gWifiMethods[] = {
     { "setBssidBlacklistNative", "(II[Ljava/lang/String;)Z",
             (void*)android_net_wifi_setBssidBlacklist},
     { "setSsidWhitelistNative", "(II[Ljava/lang/String;)Z",
-             (void*)android_net_wifi_setSsidWhitelist},
+            (void*)android_net_wifi_setSsidWhitelist},
     {"setLoggingEventHandlerNative", "(II)Z", (void *) android_net_wifi_set_log_handler},
-    {"resetLogHandlerNative", "(II)Z", (void *) android_net_wifi_reset_log_handler}
+    {"resetLogHandlerNative", "(II)Z", (void *) android_net_wifi_reset_log_handler},
+    {"isGetChannelsForBandSupportedNative", "()Z",
+            (void*)android_net_wifi_is_get_channels_for_band_supported}
 };
 
 int register_android_net_wifi_WifiNative(JNIEnv* env) {
-- 
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