From 5242bc7613311aa1a3d5ed41e9cf81015b65563f Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Tue, 9 Jun 2009 08:17:14 +0200
Subject: 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 <tiwai@suse.de>

diff --git a/sound/pci/ctxfi/ctatc.c b/sound/pci/ctxfi/ctatc.c
index 799eb98..e54006e 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;
 }
 
-- 
cgit v0.10.2