Index: uspace/drv/audio/hdaudio/pcm_iface.c
===================================================================
--- uspace/drv/audio/hdaudio/pcm_iface.c	(revision 0e4c5f0b7a21f09f35471fba7a626dff3790ce97)
+++ uspace/drv/audio/hdaudio/pcm_iface.c	(revision 4a5ae542f43adbdc517ee90ece18b4376dc08468)
@@ -228,4 +228,5 @@
 
 	hda_stream_buffers_free(hda->pcm_buffers);
+	hda->pcm_buffers = NULL;
 
 	hda_unlock(hda);