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: (348 commits)
  ALSA: hda - Fix NULL-derefence with a single mic in STAC auto-mic detection
  ALSA: hda - Add missing NID 0x19 fixup for Sony VAIO
  ALSA: hda - Fix ALC275 enable hardware EQ for SONY VAIO
  ALSA: oxygen: fix Xonar DG input
  ALSA: hda - Fix EAPD on Lenovo NB ALC269 to low
  ALSA: hda - Fix missing EAPD for Acer 4930G
  ALSA: hda: Disable 4/6 channels on some NVIDIA GPUs.
  ALSA: hda - Add static_hdmi_pcm option to HDMI codec parser
  ALSA: hda - Don't refer ELD when unplugged
  ASoC: tpa6130a2: Fix compiler warning
  ASoC: tlv320dac33: Add DAPM selection for LOM invert
  ASoC: DMIC codec: Adding a generic DMIC codec
  ALSA: snd-usb-us122l: Fix missing NULL checks
  ALSA: snd-usb-us122l: Fix MIDI output
  ASoC: soc-cache: Fix invalid memory access during snd_soc_lzo_cache_sync()
  ASoC: Fix section mismatch in wm8995.c
  ALSA: oxygen: add S/PDIF source selection for Claro cards
  ALSA: oxygen: fix CD/MIDI for X-Meridian (2G)
  ASoC: fix migor audio build
  ALSA: include delay.h for msleep in Xonar DG support
  ...

1 files changed, 22 insertions, 0 deletions

diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index 11446a1506d..a82e3756a72 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -373,6 +373,27 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream,
                            (unsigned long)new_hw_ptr,
                            (unsigned long)runtime->hw_ptr_base);
         }
+
+        if (runtime->no_period_wakeup) {
+                /*
+                 * Without regular period interrupts, we have to check
+                 * the elapsed time to detect xruns.
+                 */
+                jdelta = jiffies - runtime->hw_ptr_jiffies;
+                if (jdelta < runtime->hw_ptr_buffer_jiffies / 2)
+                        goto no_delta_check;
+                hdelta = jdelta - delta * HZ / runtime->rate;
+                while (hdelta > runtime->hw_ptr_buffer_jiffies / 2 + 1) {
+                        delta += runtime->buffer_size;
+                        hw_base += runtime->buffer_size;
+                        if (hw_base >= runtime->boundary)
+                                hw_base = 0;
+                        new_hw_ptr = hw_base + pos;
+                        hdelta -= runtime->hw_ptr_buffer_jiffies;
+                }
+                goto no_delta_check;
+        }
+
         /* something must be really wrong */
         if (delta >= runtime->buffer_size + runtime->period_size) {
                 hw_ptr_error(substream,
@@ -442,6 +463,7 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream,
                              (long)old_hw_ptr);
         }
 
+ no_delta_check:
         if (runtime->status->hw_ptr == new_hw_ptr)
                 return 0;