ALSA: ctxfi - Check the presence of SRC instance in PCM pointer callbacks
authorTakashi Iwai <tiwai@suse.de>
Tue, 9 Jun 2009 06:17:14 +0000 (08:17 +0200)
committerTakashi Iwai <tiwai@suse.de>
Tue, 9 Jun 2009 06:17:14 +0000 (08:17 +0200)
The SRC instances may not exist when PCM pointer callback is called at
the state before initialization is finished.  Add the NULL check just
to be sure.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/pci/ctxfi/ctatc.c

index 799eb98e77943e606779c70ef4ab124a482c7bb2..e54006ef83cf2c743265ce356f744b5c67e40285 100644 (file)
@@ -445,6 +445,8 @@ atc_pcm_playback_position(struct ct_atc *atc, struct ct_atc_pcm *apcm)
        u32 size, max_cisz;
        int position;
 
+       if (!src)
+               return 0;
        position = src->ops->get_ca(src);
 
        size = apcm->vm_block->size;
@@ -782,6 +784,8 @@ atc_pcm_capture_position(struct ct_atc *atc, struct ct_atc_pcm *apcm)
 {
        struct src *src = apcm->src;
 
+       if (!src)
+               return 0;
        return src->ops->get_ca(src) - apcm->vm_block->addr;
 }