codec->pcm = NULL; 
codec->pcm[pcm->device] = NULL; 
static void snd_ali_pcm_free(snd_pcm_t *pcm){	ali_t *codec = pcm->private_data;	codec->pcm = NULL;}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/5cbff89cbc1087870c32ecb0b7f1965f93ec5401/ali5451.c/clean/sound/pci/ali5451/ali5451.c