diff -urN alsa-lib-1.0.23-orig/src/pcm/pcm_rate.c alsa-lib-1.0.23/src/pcm/pcm_rate.c
--- alsa-lib-1.0.23-orig/src/pcm/pcm_rate.c	2010-04-16 20:11:05 +0900
+++ alsa-lib-1.0.23/src/pcm/pcm_rate.c	2010-11-11 12:17:26 +0900
@@ -381,8 +381,8 @@
 		return err;
 	sboundary = sparams->boundary;
 	*sparams = *params;
-	boundary1 = pcm->buffer_size;
-	boundary2 = slave->buffer_size;
+	boundary1 = pcm->period_size;
+	boundary2 = slave->period_size;
 	while (boundary1 * 2 <= LONG_MAX - pcm->buffer_size &&
 	       boundary2 * 2 <= LONG_MAX - slave->buffer_size) {
 		boundary1 *= 2;