From c7f084f61c3ad24acb35cde1854808285216d3de Mon Sep 17 00:00:00 2001
From: Paul McLean <pmclean@google.com>
Date: Wed, 13 Aug 2014 15:45:52 -0700
Subject: [PATCH] Fix ALSA initialized wait for input-only USB Audio devices

Bug 17012266

Change-Id: I09427bb924f895bf66af9ef7ad4f0882746d03c4
---
 .../com/android/server/usb/UsbHostManager.java   | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/services/usb/java/com/android/server/usb/UsbHostManager.java b/services/usb/java/com/android/server/usb/UsbHostManager.java
index bcbae607d9f3a..5860fc7c81ccc 100644
--- a/services/usb/java/com/android/server/usb/UsbHostManager.java
+++ b/services/usb/java/com/android/server/usb/UsbHostManager.java
@@ -314,14 +314,22 @@ public class UsbHostManager {
         mConnectedUsbCard = cardsParser.getNumCardRecords() - 1;
         mConnectedUsbDeviceNum = 0;
 
-        if (!waitForAlsaFile(mConnectedUsbCard, mConnectedUsbDeviceNum, false)) {
-            return;
-        }
-
         mConnectedHasPlayback = devicesParser.hasPlaybackDevices(mConnectedUsbCard);
         mConnectedHasCapture = devicesParser.hasCaptureDevices(mConnectedUsbCard);
         mConnectedHasMIDI = devicesParser.hasMIDIDevices(mConnectedUsbCard);
 
+        // Playback device file needed/present?
+        if (mConnectedHasPlayback &&
+            !waitForAlsaFile(mConnectedUsbCard, mConnectedUsbDeviceNum, false)) {
+            return;
+        }
+
+        // Capture device file needed/present?
+        if (mConnectedHasCapture &&
+            !waitForAlsaFile(mConnectedUsbCard, mConnectedUsbDeviceNum, true)) {
+            return;
+        }
+
         if (DEBUG_AUDIO) {
             Slog.d(TAG,
                     "usb: hasPlayback:" + mConnectedHasPlayback + " hasCapture:" + mConnectedHasCapture);