diff --git a/src/common/pa_process.c b/src/common/pa_process.c
index 29fca64fa..468693afb 100644
--- a/src/common/pa_process.c
+++ b/src/common/pa_process.c
@@ -1287,18 +1287,15 @@ static void CopyTempOutputBuffersToHostOutputBuffers( PaUtilBufferProcessor *bp)
     data from the temporary output buffer into the host output buffers, then
     from the host input buffers into the temporary input buffers. Calling the
     streamCallback when necessary.
-    When processPartialUserBuffers is 0, all available input data will be
-    consumed and all available output space will be filled. When
-    processPartialUserBuffers is non-zero, as many full user buffers
-    as possible will be processed, but partial buffers will not be consumed.
+    All available input data will be consumed and all available output space
+    will be filled.
 */
 static unsigned long AdaptingProcess( PaUtilBufferProcessor *bp,
-        int *streamCallbackResult, int processPartialUserBuffers )
+        int *streamCallbackResult )
 {
     void *userInput, *userOutput;
     unsigned long framesProcessed = 0;
     unsigned long framesAvailable;
-    unsigned long endProcessingMinFrameCount;
     unsigned long maxFramesToCopy;
     PaUtilChannelDescriptor *hostInputChannels, *hostOutputChannels;
     unsigned int frameCount;
@@ -1310,15 +1307,10 @@ static unsigned long AdaptingProcess( PaUtilBufferProcessor *bp,
 
     framesAvailable = bp->hostInputFrameCount[0] + bp->hostInputFrameCount[1];/* this is assumed to be the same as the output buffer's frame count */
 
-    if( processPartialUserBuffers )
-        endProcessingMinFrameCount = 0;
-    else
-        endProcessingMinFrameCount = (bp->framesPerUserBuffer - 1);
-
     /* Fill host output with remaining frames in user output (tempOutputBuffer) */
     CopyTempOutputBuffersToHostOutputBuffers( bp );
 
-    while( framesAvailable > endProcessingMinFrameCount )
+    while( framesAvailable >= bp->framesPerUserBuffer )
     {
 
         if( bp->framesInTempOutputBuffer == 0 && *streamCallbackResult != paContinue )
@@ -1612,16 +1604,7 @@ unsigned long PaUtil_EndBufferProcessing( PaUtilBufferProcessor* bp, int *stream
         {
             /* full duplex */
 
-            if( bp->hostBufferSizeMode == paUtilVariableHostBufferSizePartialUsageAllowed  )
-            {
-                framesProcessed = AdaptingProcess( bp, streamCallbackResult,
-                        0 /* dont process partial user buffers */ );
-            }
-            else
-            {
-                framesProcessed = AdaptingProcess( bp, streamCallbackResult,
-                        1 /* process partial user buffers */ );
-            }
+            framesProcessed = AdaptingProcess( bp, streamCallbackResult );
         }
         else if( bp->inputChannelCount != 0 )
         {
diff --git a/src/common/pa_process.h b/src/common/pa_process.h
index 444bdf545..d87c45ab8 100644
--- a/src/common/pa_process.h
+++ b/src/common/pa_process.h
@@ -225,15 +225,6 @@ typedef enum {
 
 /** Nothing is known about the host buffer size. */
     paUtilUnknownHostBufferSize,
-
-/** The host buffer size varies, and the client does not require the buffer
- processor to consume all of the input and fill all of the output buffer. This
- is useful when the implementation has access to the host API's circular buffer
- and only needs to consume/fill some of it, not necessarily all of it, with each
- call to the buffer processor. This is the only mode where
- PaUtil_EndBufferProcessing() may not consume the whole buffer.
-*/
-    paUtilVariableHostBufferSizePartialUsageAllowed
 }PaUtilHostBufferSizeMode;
 
 
@@ -652,9 +643,7 @@ void PaUtil_BeginBufferProcessing( PaUtilBufferProcessor* bufferProcessor,
  wasn't generated by the terminating callback.
 
  @return The number of frames processed. This usually corresponds to the
- number of frames specified by the PaUtil_Set*FrameCount functions, except in
- the paUtilVariableHostBufferSizePartialUsageAllowed buffer size mode when a
- smaller value may be returned.
+ number of frames specified by the PaUtil_Set*FrameCount functions.
 */
 unsigned long PaUtil_EndBufferProcessing( PaUtilBufferProcessor* bufferProcessor,
         int *callbackResult );
diff --git a/src/hostapi/asihpi/pa_linux_asihpi.c b/src/hostapi/asihpi/pa_linux_asihpi.c
index db8efcc21..439f75a43 100644
--- a/src/hostapi/asihpi/pa_linux_asihpi.c
+++ b/src/hostapi/asihpi/pa_linux_asihpi.c
@@ -1322,9 +1322,6 @@ static void PaAsiHpi_StreamComponentDump( PaAsiHpiStreamComponent *streamComp,
     case paUtilUnknownHostBufferSize:
         PA_DEBUG(( "[unknown] " ));
         break;
-    case paUtilVariableHostBufferSizePartialUsageAllowed:
-        PA_DEBUG(( "[variable] " ));
-        break;
     }
     PA_DEBUG(( "(%d max)\n", streamComp->tempBufferSize / streamComp->bytesPerFrame ));
     /* HPI hardware settings */
diff --git a/src/hostapi/dsound/pa_win_ds.c b/src/hostapi/dsound/pa_win_ds.c
index b0ab18725..038ada4e6 100644
--- a/src/hostapi/dsound/pa_win_ds.c
+++ b/src/hostapi/dsound/pa_win_ds.c
@@ -2052,20 +2052,6 @@ static PaError OpenStream( struct PaUtilHostApiRepresentation *hostApi,
         hostOutputSampleFormat = 0;
     }
 
-    result =  PaUtil_InitializeBufferProcessor( &stream->bufferProcessor,
-                    inputChannelCount, inputSampleFormat, hostInputSampleFormat,
-                    outputChannelCount, outputSampleFormat, hostOutputSampleFormat,
-                    sampleRate, streamFlags, framesPerBuffer,
-                    0, /* ignored in paUtilVariableHostBufferSizePartialUsageAllowed mode. */
-                /* This next mode is required because DS can split the host buffer when it wraps around. */
-                    paUtilVariableHostBufferSizePartialUsageAllowed,
-                    streamCallback, userData );
-    if( result != paNoError )
-        goto error;
-
-    bufferProcessorIsInitialized = 1;
-
-
 /* DirectSound specific initialization */
     {
         HRESULT          hr;
@@ -2131,6 +2117,17 @@ static PaError OpenStream( struct PaUtilHostApiRepresentation *hostApi,
         DBUG(("DirectSound host buffer size frames: %d, polling period seconds: %f, @ sr: %f\n",
                 stream->hostBufferSizeFrames, stream->pollingPeriodSeconds, sampleRate ));
 
+        result = PaUtil_InitializeBufferProcessor(&stream->bufferProcessor,
+            inputChannelCount, inputSampleFormat, hostInputSampleFormat,
+            outputChannelCount, outputSampleFormat, hostOutputSampleFormat,
+            sampleRate, streamFlags, framesPerBuffer,
+            stream->hostBufferSizeFrames, paUtilBoundedHostBufferSize,
+            streamCallback, userData);
+        if (result != paNoError)
+            goto error;
+
+        bufferProcessorIsInitialized = 1;
+
 
         /* ------------------ OUTPUT */
         if( outputParameters )