Merge branch 'master' of git://git.alsa-project.org/alsa-kernel into for-linus

* 'master' of git://git.alsa-project.org/alsa-kernel:
  [ALSA] intel8x0: add one retry to the ac97_clock measurement routine
  [ALSA] intel8x0: fix wrong conditions in ac97_clock measure routine
  [ALSA] intel8x0: do not use zero value from PICB register
  [ALSA] intel8x0: an attempt to make ac97_clock measurement more reliable
  [ALSA] pcm-midlevel: Add more strict buffer position checks based on jiffies
  [ALSA] hda_intel: fix unexpected ring buffer positions

diff --combined sound/pci/hda/hda_intel.c
index 7ba8db5d4c42176787b283aea0246685d63342f9,6d3b927e0f84b3ba173e085be959e7115501390a..bc882f8f163c4f9843d9f594c81d5b90036af2ae
--- 1/sound/pci/hda/hda_intel.c
--- 2/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@@ -312,6 -312,9 +312,9 @@@ struct azx_dev 
        unsigned int period_bytes; /* size of the period in bytes */
        unsigned int frags;     /* number for period in the play buffer */
        unsigned int fifo_size; /* FIFO size */
+       unsigned int start_flag: 1;     /* stream full start flag */
+       unsigned long start_jiffies;    /* start + minimum jiffies */
+       unsigned long min_jiffies;      /* minimum jiffies before position is valid */
  
        void __iomem *sd_addr;  /* stream descriptor pointer */
  
@@@ -330,7 -333,6 +333,6 @@@
        unsigned int opened :1;
        unsigned int running :1;
        unsigned int irq_pending :1;
-       unsigned int irq_ignore :1;
        /*
         * For VIA:
         *  A flag to ensure DMA position is 0
@@@ -975,7 -977,7 +977,7 @@@ static irqreturn_t azx_interrupt(int ir
        struct azx *chip = dev_id;
        struct azx_dev *azx_dev;
        u32 status;
-       int i;
+       int i, ok;
  
        spin_lock(&chip->reg_lock);
  
@@@ -991,18 -993,14 +993,14 @@@
                        azx_sd_writeb(azx_dev, SD_STS, SD_INT_MASK);
                        if (!azx_dev->substream || !azx_dev->running)
                                continue;
-                       /* ignore the first dummy IRQ (due to pos_adj) */
-                       if (azx_dev->irq_ignore) {
-                               azx_dev->irq_ignore = 0;
-                               continue;
-                       }
                        /* check whether this IRQ is really acceptable */
-                       if (azx_position_ok(chip, azx_dev)) {
+                       ok = azx_position_ok(chip, azx_dev);
+                       if (ok == 1) {
                                azx_dev->irq_pending = 0;
                                spin_unlock(&chip->reg_lock);
                                snd_pcm_period_elapsed(azx_dev->substream);
                                spin_lock(&chip->reg_lock);
-                       } else if (chip->bus && chip->bus->workq) {
+                       } else if (ok == 0 && chip->bus && chip->bus->workq) {
                                /* bogus IRQ, process it later */
                                azx_dev->irq_pending = 1;
                                queue_work(chip->bus->workq,
@@@ -1088,7 -1086,6 +1086,6 @@@ static int azx_setup_periods(struct az
        bdl = (u32 *)azx_dev->bdl.area;
        ofs = 0;
        azx_dev->frags = 0;
-       azx_dev->irq_ignore = 0;
        pos_adj = bdl_pos_adj[chip->dev_index];
        if (pos_adj > 0) {
                struct snd_pcm_runtime *runtime = substream->runtime;
@@@ -1109,7 -1106,6 +1106,6 @@@
                                         &bdl, ofs, pos_adj, 1);
                        if (ofs < 0)
                                goto error;
-                       azx_dev->irq_ignore = 1;
                }
        } else
                pos_adj = 0;
@@@ -1155,6 -1151,9 +1151,9 @@@ static void azx_stream_reset(struct az
        while (((val = azx_sd_readb(azx_dev, SD_CTL)) & SD_CTL_STREAM_RESET) &&
               --timeout)
                ;
+ 
+       /* reset first position - may not be synced with hw at this time */
+       *azx_dev->posbuf = 0;
  }
  
  /*
@@@ -1409,7 -1408,6 +1408,6 @@@ static int azx_pcm_open(struct snd_pcm_
        snd_pcm_set_sync(substream);
        mutex_unlock(&chip->open_mutex);
  
-       azx_stream_reset(chip, azx_dev);
        return 0;
  }
  
@@@ -1474,6 -1472,7 +1472,7 @@@ static int azx_pcm_prepare(struct snd_p
        unsigned int bufsize, period_bytes, format_val;
        int err;
  
+       azx_stream_reset(chip, azx_dev);
        format_val = snd_hda_calc_stream_format(runtime->rate,
                                                runtime->channels,
                                                runtime->format,
@@@ -1502,6 -1501,8 +1501,8 @@@
                        return err;
        }
  
+       azx_dev->min_jiffies = (runtime->period_size * HZ) /
+                                               (runtime->rate * 2);
        azx_setup_controller(chip, azx_dev);
        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
                azx_dev->fifo_size = azx_sd_readw(azx_dev, SD_FIFOSIZE) + 1;
@@@ -1518,13 -1519,14 +1519,14 @@@ static int azx_pcm_trigger(struct snd_p
        struct azx *chip = apcm->chip;
        struct azx_dev *azx_dev;
        struct snd_pcm_substream *s;
-       int start, nsync = 0, sbits = 0;
+       int rstart = 0, start, nsync = 0, sbits = 0;
        int nwait, timeout;
  
        switch (cmd) {
+       case SNDRV_PCM_TRIGGER_START:
+               rstart = 1;
        case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
        case SNDRV_PCM_TRIGGER_RESUME:
-       case SNDRV_PCM_TRIGGER_START:
                start = 1;
                break;
        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
@@@ -1554,6 -1556,10 +1556,10 @@@
                if (s->pcm->card != substream->pcm->card)
                        continue;
                azx_dev = get_azx_dev(s);
+               if (rstart) {
+                       azx_dev->start_flag = 1;
+                       azx_dev->start_jiffies = jiffies + azx_dev->min_jiffies;
+               }
                if (start)
                        azx_stream_start(chip, azx_dev);
                else
@@@ -1703,6 -1709,11 +1709,11 @@@ static int azx_position_ok(struct azx *
  {
        unsigned int pos;
  
+       if (azx_dev->start_flag &&
+           time_before_eq(jiffies, azx_dev->start_jiffies))
+               return -1;      /* bogus (too early) interrupt */
+       azx_dev->start_flag = 0;
+ 
        pos = azx_get_position(chip, azx_dev);
        if (chip->position_fix == POS_FIX_AUTO) {
                if (!pos) {
@@@ -2260,11 -2271,11 +2271,11 @@@ static int __devinit azx_create(struct 
                gcap &= ~0x01;
  
        /* allow 64bit DMA address if supported by H/W */
 -      if ((gcap & 0x01) && !pci_set_dma_mask(pci, DMA_64BIT_MASK))
 -              pci_set_consistent_dma_mask(pci, DMA_64BIT_MASK);
 +      if ((gcap & 0x01) && !pci_set_dma_mask(pci, DMA_BIT_MASK(64)))
 +              pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(64));
        else {
 -              pci_set_dma_mask(pci, DMA_32BIT_MASK);
 -              pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK);
 +              pci_set_dma_mask(pci, DMA_BIT_MASK(32));
 +              pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(32));
        }
  
        /* read number of streams from GCAP register instead of using