Allow runtime loading of cpufreq driver

Android assumes that cpufreq driver is loaded during boot
time. Loading the driver after the boot process is complete
results in a crash in ActivityManager.The commit handles the
case when the driver is loaded after boot process is complete.

This issue was observe on vexpress_rtsm platform:
https://bugs.launchpad.net/linaro-big-little-integrated/+bug/1000374

Change-Id: Ibf526d6c2722cea36d0b2075f100019989243c76
Signed-off-by: Vishal Bhoj <vishal.bhoj@linaro.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/core/java/com/android/internal/os/ProcessStats.java b/core/java/com/android/internal/os/ProcessStats.java
index e0e9a29714d1..e17ede699838 100644
--- a/core/java/com/android/internal/os/ProcessStats.java
+++ b/core/java/com/android/internal/os/ProcessStats.java
@@ -569,6 +569,10 @@ public class ProcessStats {
             while (st.hasMoreElements()) {
                 String token = st.nextToken();
                 try {
+                    if (out.length == 0) {
+                        tempTimes = new long[MAX_SPEEDS];
+                        tempSpeeds = new long[MAX_SPEEDS];
+                    }
                     long val = Long.parseLong(token);
                     tempSpeeds[speed] = val;
                     token = st.nextToken();
@@ -585,7 +589,7 @@ public class ProcessStats {
                 }
             }
         }
-        if (out == null) {
+        if (out == null || out.length == 0) {
             out = new long[speed];
             mCpuSpeeds = new long[speed];
             System.arraycopy(tempSpeeds, 0, mCpuSpeeds, 0, speed);