Index: pcm_rate.c
===================================================================
RCS file: /cvsroot/alsa/alsa-lib/src/pcm/pcm_rate.c,v
--- pcm_rate.c	17 Mar 2004 11:48:15 -0000	1.81
+++ pcm_rate.c	23 Mar 2004 14:36:54 -0000
@@ -1079,6 +1079,8 @@ 
 	      __partial:
 		xfer = 0;
 		cont = rate->slave->buffer_size - slave_offset;
+		if (cont > rate->slave->period_size)
+			cont = rate->slave->period_size;
 		snd_pcm_areas_copy(rate->sareas, 0,
 				   slave_areas, slave_offset,
 				   pcm->channels, cont,