From 5242bc7613311aa1a3d5ed41e9cf81015b65563f Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 9 Jun 2009 08:17:14 +0200 Subject: [PATCH] ALSA: ctxfi - Check the presence of SRC instance in PCM pointer callbacks 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 --- sound/pci/ctxfi/ctatc.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/sound/pci/ctxfi/ctatc.c b/sound/pci/ctxfi/ctatc.c index 799eb98e7794..e54006ef83cf 100644 --- a/sound/pci/ctxfi/ctatc.c +++ b/sound/pci/ctxfi/ctatc.c @@ -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; }