ALSA: control: Avoid kernel warnings from tlv ioctl with numid 0

[pandora-kernel.git] / sound / drivers / aloop.c

diff --git a/sound/drivers/aloop.c b/sound/drivers/aloop.c
index d83bafc..42b876d 100644 (file)
--- a/sound/drivers/aloop.c
+++ b/sound/drivers/aloop.c
@@ -119,6 +119,7 @@ struct loopback_pcm {
        unsigned int period_size_frac;
        unsigned long last_jiffies;
        struct timer_list timer;
+       spinlock_t timer_lock;
 };
 
 static struct platform_device *devices[SNDRV_CARDS];
@@ -169,6 +170,7 @@ static void loopback_timer_start(struct loopback_pcm *dpcm)
        unsigned long tick;
        unsigned int rate_shift = get_rate_shift(dpcm);
 
+       spin_lock(&dpcm->timer_lock);
        if (rate_shift != dpcm->pcm_rate_shift) {
                dpcm->pcm_rate_shift = rate_shift;
                dpcm->period_size_frac = frac_pos(dpcm, dpcm->pcm_period_size);
@@ -181,12 +183,15 @@ static void loopback_timer_start(struct loopback_pcm *dpcm)
        tick = (tick + dpcm->pcm_bps - 1) / dpcm->pcm_bps;
        dpcm->timer.expires = jiffies + tick;
        add_timer(&dpcm->timer);
+       spin_unlock(&dpcm->timer_lock);
 }
 
 static inline void loopback_timer_stop(struct loopback_pcm *dpcm)
 {
+       spin_lock(&dpcm->timer_lock);
        del_timer(&dpcm->timer);
        dpcm->timer.expires = 0;
+       spin_unlock(&dpcm->timer_lock);
 }
 
 #define CABLE_VALID_PLAYBACK   (1 << SNDRV_PCM_STREAM_PLAYBACK)
@@ -282,12 +287,14 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
                        loopback_active_notify(dpcm);
                break;
        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+       case SNDRV_PCM_TRIGGER_SUSPEND:
                spin_lock(&cable->lock);        
                cable->pause |= stream;
                spin_unlock(&cable->lock);
                loopback_timer_stop(dpcm);
                break;
        case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+       case SNDRV_PCM_TRIGGER_RESUME:
                spin_lock(&cable->lock);
                dpcm->last_jiffies = jiffies;
                cable->pause &= ~stream;
@@ -547,7 +554,8 @@ static snd_pcm_uframes_t loopback_pointer(struct snd_pcm_substream *substream)
 static struct snd_pcm_hardware loopback_pcm_hardware =
 {
        .info =         (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP |
-                        SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE),
+                        SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE |
+                        SNDRV_PCM_INFO_RESUME),
        .formats =      (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
                         SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE |
                         SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE),
@@ -659,6 +667,7 @@ static int loopback_open(struct snd_pcm_substream *substream)
        dpcm->substream = substream;
        setup_timer(&dpcm->timer, loopback_timer_function,
                    (unsigned long)dpcm);
+       spin_lock_init(&dpcm->timer_lock);
 
        cable = loopback->cables[substream->number][dev];
        if (!cable) {