Merge "Describe how the accessory input stream drops data"

diff --cc core/java/android/hardware/usb/UsbManager.java
index 74a36df,2e94adc..572c585
--- 1/core/java/android/hardware/usb/UsbManager.java
--- 2/core/java/android/hardware/usb/UsbManager.java
+++ b/core/java/android/hardware/usb/UsbManager.java
@@@ -454,10 -449,13 +454,14 @@@ public class UsbManager 
      /**
       * Opens a file descriptor for reading and writing data to the USB accessory.
       *
+      * <p>If data is read from the {@link java.io.InputStream} created from this file descriptor all
+      * data of a USB transfer should be read at once. If only a partial request is read the rest of
+      * the transfer is dropped.
+      *
       * @param accessory the USB accessory to open
-      * @return file descriptor, or null if the accessor could not be opened.
+      * @return file descriptor, or null if the accessory could not be opened.
       */
 +    @RequiresFeature(PackageManager.FEATURE_USB_ACCESSORY)
      public ParcelFileDescriptor openAccessory(UsbAccessory accessory) {
          try {
              return mService.openAccessory(accessory);