Revert "Make NDMP ImageStream buffer dynamically allocated size."

This reverts commit d4ea100.

It seems we don't have the right info for dynamically sizing
the buffers at the specific place in the library. So this needs more
testing.

src/ndmp/ndma_image_stream.c

@@ -93,13 +93,6 @@ ndmis_initialize (struct ndm_session *sess)
 	NDMOS_MACRO_ZEROFILL (sess->plumb.image_stream);
 	NDMOS_MACRO_ZEROFILL (&sess->plumb.image_stream->chan);
 
-	sess->plumb.image_stream->buf = NDMOS_API_MALLOC (sess->control_acb->job.record_size);
-	if (!sess->plumb.image_stream->buf) {
-		NDMOS_API_FREE (sess->plumb.image_stream);
-		return -1;
-	}
-	NDMOS_MACRO_ZEROFILL (sess->plumb.image_stream->buf);
-
 	ndmis_reinit_remote (sess);
 
 	sess->plumb.image_stream->data_ep.name = "DATA";
@@ -130,13 +123,11 @@ ndmis_destroy (struct ndm_session *sess)
 		return 0;
 	}
 
-	NDMOS_API_FREE (sess->plumb.image_stream->buf);
 	NDMOS_API_FREE (sess->plumb.image_stream);
 	sess->plumb.image_stream = NULL;
 
 	return 0;
 }
-
 /* Belay -- Cancel partially issued activation/start */
 int
 ndmis_belay (struct ndm_session *sess)

src/ndmp/ndmagents.h

@@ -932,6 +932,10 @@ extern int		ndmra_destroy (struct ndm_session *sess);
  ****************************************************************
  */
 
+#ifndef NDM_N_IMAGE_STREAM_BUF
+#define NDM_N_IMAGE_STREAM_BUF	(100*1024)
+#endif
+
 enum ndmis_connect_status {
 	NDMIS_CONN_IDLE = 0,
 	NDMIS_CONN_LISTEN,
@@ -971,7 +975,7 @@ struct ndm_image_stream {
 	/* transfer stuff */
 	int			transfer_mode;
 	struct ndmchan		chan;
-	char *			buf;
+	char			buf[NDM_N_IMAGE_STREAM_BUF];
 };
 
 extern int		ndmis_initialize (struct ndm_session *sess);