--- alsa-driver-hg20080516/drivers/aloop-kernel.c	2008-05-22 13:37:09.000000000 +0200
+++ alsa-driver-hg20080516.patch/drivers/aloop-kernel.c	2008-05-22 14:49:12.000000000 +0200
@@ -232,6 +232,8 @@
 static void snd_card_loopback_runtime_free(struct snd_pcm_runtime *runtime)
 {
 	snd_card_loopback_pcm_t *dpcm = runtime->private_data;
+	snd_assert(dpcm != NULL, return);
+	del_timer(&dpcm->timer);
 	kfree(dpcm);
 }
 
@@ -265,6 +267,9 @@
 	snd_card_loopback_pcm_t *dpcm = runtime->private_data;
 	snd_card_loopback_cable_t *cable = dpcm->cable;
 
+	snd_assert(dpcm != NULL, return -EINVAL);
+	del_timer(&dpcm->timer);
+
 	snd_pcm_set_runtime_buffer(substream, NULL);
 
 	if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) {
@@ -349,6 +354,10 @@
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	snd_card_loopback_pcm_t *dpcm = runtime->private_data;
+
+	snd_assert(dpcm != NULL, return -EINVAL);
+	del_timer(&dpcm->timer);
+
 	if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) {
 		dpcm->cable->playback_valid = 0;
 		dpcm->cable->playback_running = 0;