Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
  ALSA: hda - Don't check invalid HP pin
  ALSA: dummy - Fix descriptions of pcm_substreams parameter
  ALSA: pcmcia: use dynamic debug infrastructure, deprecate CS_CHECK (sound)
  ALSA: hda: Use quirk mask for Dell Inspiron Mini9/Vostro A90 using ALC268
  sound: via82xx: deactivate DXS controls of inactive streams
  ALSA: snd-usb-caiaq: Bump version number to 1.3.20
  ALSA: snd-usb-caiaq: Lock on stream start/unpause
  ALSA: snd-usb-caiaq: Missing lock around use of buffer positions
  ALSA: sound/parisc: Move dereference after NULL test
  ALSA: sound: Move dereference after NULL test and drop unnecessary NULL tests
  ALSA: hda_intel: Add the Linux device ID for NVIDIA HDA controller
  ALSA: pcsp - Fix nforce workaround
  ALSA: SND_CS5535AUDIO: Remove the X86 platform dependency
  ASoC: Amstrad Delta: add info about the line discipline requirement to Kconfig help text
  ASoC: Fix possible codec_dai->ops NULL pointer problems
  ALSA: hda - Fix capture source checks for ALC662/663 codecs
  ASoC: Serialize access to dapm_power_widgets()

1 files changed, 13 insertions, 3 deletions

diff --git a/sound/usb/caiaq/audio.c b/sound/usb/caiaq/audio.c
index 121af0644fd9..86b2c3b92df5 100644
--- a/sound/usb/caiaq/audio.c
+++ b/sound/usb/caiaq/audio.c
@@ -62,10 +62,14 @@ static void
 activate_substream(struct snd_usb_caiaqdev *dev,
                    struct snd_pcm_substream *sub)
 {
+        spin_lock(&dev->spinlock);
+
         if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
                 dev->sub_playback[sub->number] = sub;
         else
                 dev->sub_capture[sub->number] = sub;
+
+        spin_unlock(&dev->spinlock);
 }
 
 static void
@@ -269,16 +273,22 @@ snd_usb_caiaq_pcm_pointer(struct snd_pcm_substream *sub)
 {
         int index = sub->number;
         struct snd_usb_caiaqdev *dev = snd_pcm_substream_chip(sub);
+        snd_pcm_uframes_t ptr;
+
+        spin_lock(&dev->spinlock);
 
         if (dev->input_panic || dev->output_panic)
-                return SNDRV_PCM_POS_XRUN;
+                ptr = SNDRV_PCM_POS_XRUN;
 
         if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
-                return bytes_to_frames(sub->runtime,
+                ptr = bytes_to_frames(sub->runtime,
                                         dev->audio_out_buf_pos[index]);
         else
-                return bytes_to_frames(sub->runtime,
+                ptr = bytes_to_frames(sub->runtime,
                                         dev->audio_in_buf_pos[index]);
+
+        spin_unlock(&dev->spinlock);
+        return ptr;
 }
 
 /* operators for both playback and capture */