--- pcm.c.old	2007-11-04 17:57:01.000000000 +0300
+++ pcm.c	2007-11-07 21:34:59.000000000 +0300
@@ -6465,19 +6465,35 @@
 			goto _end;
 		}
 		if ((state == SND_PCM_STATE_RUNNING &&
-		     (snd_pcm_uframes_t)avail < pcm->avail_min &&
 		     size > (snd_pcm_uframes_t)avail) ||
 		    (size >= pcm->xfer_align &&
 		     (snd_pcm_uframes_t)avail < pcm->xfer_align)) {
+			snd_pcm_sframes_t avail_min, orig_avail_min;
+			snd_pcm_sw_params_t params;
 
 			if (pcm->mode & SND_PCM_NONBLOCK) {
 				err = -EAGAIN;
 				goto _end;
 			}
 
+			avail_min = (size < pcm->period_size ?
+				size : pcm->period_size);
+			orig_avail_min = pcm->avail_min;
+			if (avail_min != pcm->avail_min) {
+				snd_pcm_sw_params_current(pcm, &params);
+				params.avail_min = avail_min;
+				snd_pcm_sw_params(pcm, &params);
+			}
+
 			err = snd_pcm_wait(pcm, -1);
 			if (err < 0)
 				break;
+
+			if (orig_avail_min != pcm->avail_min) {
+				params.avail_min = orig_avail_min;
+				snd_pcm_sw_params(pcm, &params);
+			}
+
 			goto _again;			
 		}
 		if ((snd_pcm_uframes_t) avail > pcm->xfer_align)